Battery pack charging device and battery pack charging apparatus

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack charging device and battery pack charging equipment, and the battery pack charging device comprises a battery pack charging device body and a first cooling assembly. The battery pack charging device body comprises a battery compartment. The first cooling assembly comprises a first semiconductor chilling plate. The first semiconductor chilling plate comprises a first cold end exposed out of the battery bin. The first cold end is configured to be at least partially thermally connected with the battery pack when the battery pack is disposed within the battery compartment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery pack charging device and a battery pack charging equipment. BACKGROUND

[0002] At present, the battery pack is widely used in the fields of unmanned aerial vehicle, electric vehicle, intelligent energy storage equipment and the like. When the battery pack is charging, the battery cell will emit a large amount of heat, and the temperature of the battery pack is too high, so the battery pack needs to be cooled to improve the use performance and service life of the battery pack. CONTENT OF THE INVENTION

[0003] The purpose of the present application is to provide a battery pack charging device and a battery pack charging equipment, which can improve the heat dissipation efficiency when the battery pack is charging.

[0004] According to a first aspect of the present application, a battery pack charging device is provided, comprising a battery pack charging device body and a first cooling assembly. The battery pack charging device body comprises a battery compartment. The first cooling assembly comprises a first semiconductor refrigeration sheet. The first semiconductor refrigeration sheet comprises a first cold end exposed in the battery compartment. The first cold end is configured to be at least partially thermally connected with the battery pack when the battery pack is placed in the battery compartment.

[0005] In one or more optional embodiments above, the first semiconductor refrigeration sheet comprises a first hot end. The first cooling assembly comprises a first liquid cooling. The first liquid cooling plate is connected to the first hot end, and the first liquid cooling plate comprises a flow channel, which forms a circulation loop in communication with a cold source through a pipeline.

[0006] In one or more optional embodiments above, the first liquid cooling plate comprises a first liquid inlet and a first liquid outlet. The first liquid inlet and one end of the flow channel are in communication, and the first liquid outlet and the other end of the flow channel are in communication. The first liquid inlet and the first liquid outlet are respectively in communication with the cold source through respective pipelines to form a circulation loop.

[0007] In one or more optional embodiments above, the battery pack charging device provides electric energy for the first semiconductor refrigeration sheet.

[0008] In one or more optional embodiments above, the number of the first semiconductor refrigeration sheets is two, and the two first semiconductor refrigeration sheets are arranged at intervals. The first liquid cooling plate is arranged at the first hot end of the two first semiconductor refrigeration sheets.

[0009] In one or more optional embodiments above, the battery pack charging device comprises a first heat-conducting adhesive. The first heat-conducting adhesive bonds the first liquid cooling plate and the first hot end.

[0010] In one or more optional embodiments above, the battery pack comprises a bottom wall. The first cold end is configured to be at least partially thermally connected with the bottom wall when the battery pack is placed in the battery compartment.

[0011] In one or more optional embodiments above, the battery pack charging device includes a second cooling assembly. The second cooling assembly includes a second semiconductor refrigeration plate and a first heat transfer plate. The second semiconductor refrigeration plate includes a second cold end. The first heat transfer plate is connected to the second cold end and exposed to the battery compartment, and the first heat transfer plate is configured to be in thermal contact with at least a portion of the battery pack when the battery pack is placed in the battery compartment.

[0012] In one or more optional embodiments above, the battery pack includes a left wall. The first heat transfer plate is configured to be in thermal contact with at least a portion of the left wall when the battery pack is placed in the battery compartment.

[0013] In one or more optional embodiments above, the battery pack includes a right wall. The first heat transfer plate is configured to be in thermal contact with at least a portion of the right wall when the battery pack is placed in the battery compartment.

[0014] According to a second aspect of the present application, a battery pack charging system device is provided, which includes a battery pack and the battery pack charging device described above, and the battery pack charging device is used to provide electrical energy to the battery pack.

[0015] The battery pack charging device according to the present application arranges the cold end of the semiconductor refrigeration plate in the battery compartment, and the semiconductor refrigeration plate cools the battery pack when in contact with a portion of the housing. The semiconductor refrigeration plate can control the refrigeration effect by adjusting the current size, thereby improving the performance and service life of the battery pack.

[0016] Additional aspects and advantages of embodiments of the present application will be described in part in the description that follows, will be apparent through the description, and will be learned from the practice of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] One or more embodiments are illustrated by way of example in the accompanying drawings, which are not necessarily drawn to scale, and which, if any, are further applicable to the generic functional description set forth herein maintained in cooperation therewith. The same reference numbers in different drawings identify the same components unless otherwise specified.

[0018] Figure 1 A structural schematic diagram of a battery pack charging device according to one embodiment of the present application is shown;

[0019] Figure 2 A structural schematic diagram of the battery pack charging device cooling the battery pack is shown;

[0020] Figure 3 A structural schematic diagram of a first cooling assembly according to one embodiment of the present application is shown; Figure 1 A structural exploded view of the first cooling assembly is shown;

[0021] Figure 4 A structural schematic diagram of a first liquid cooling plate according to one embodiment of the present application is shown; Figure 3 A structural schematic diagram of the first liquid cooling plate is shown;

[0022] Figure 5 For Figure 1 a structural schematic diagram of a second cooling assembly shown in the figure;

[0023] Figure 6 For Figure 5 a structural exploded view of the second cooling assembly shown in the figure;

[0024] Figure 7 For Figure 1 a structural schematic diagram of another second cooling assembly shown in the figure;

[0025] Figure 8 For Figure 7 a structural exploded view of the second cooling assembly shown in the figure;

[0026] Reference signs:

[0027] 01, battery pack charging device;

[0028] 1, battery pack charging device body; 1a, battery compartment;

[0029] 2, first cooling assembly; 21, first semiconductor refrigeration sheet; 211, first cold end; 212, first hot end; 22, first liquid cooling plate; 22a, first liquid inlet; 22b, first liquid outlet;

[0030] 3, second cooling assembly; 31, second semiconductor refrigeration sheet; 311, second cold end; 312, second hot end; 32, first heat transfer plate; 33, second liquid cooling plate; 33a, second liquid inlet; 33b, second liquid outlet;

[0031] 4, cold source;

[0032] 021, housing; 0211, front wall; 0212, rear wall; 0213, left wall; 0214, right wall; 0215, bottom wall; 0216, top wall. DETAILED DESCRIPTION

[0033] The following detailed description is exemplary and not limiting, and is intended to provide a basic understanding of the application, and is not intended to identify key or critical elements or limit the scope of the protection. As long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

[0034] When a component is considered to be "provided on" another component, it can be directly provided on the other component or a middle component can exist at the same time. When a component is considered to be "connected" to another component, it can be directly connected to the other component or a middle component can exist at the same time.

[0035] It can be understood that the term "perpendicular, equal" is used to describe the ideal state between two components. In the actual production or use state, there can be a state similar to perpendicular or equal between the two components. For example, in conjunction with numerical description, perpendicular can refer to the included angle between two straight lines in the range of 90°±10°, perpendicular can also refer to the dihedral angle between two planes in the range of 90°±10°, and perpendicular can also refer to the included angle between a straight line and a plane in the range of 90°±10°. The two components described as "perpendicular" can not be absolute straight lines or planes, and can be approximately straight lines or planes, and as a whole, the overall extension direction is considered to be a "straight line" or a "plane".

[0036] The terms "perpendicular", "horizontal", "left", "right", "top", "bottom", "front", "back", and similar expressions used herein are for illustrative purposes only and are not intended to limit the application.

[0037] The term "parallel" is used to describe the ideal state between two components. In the actual production or use state, there can be a state similar to parallel between the two components. For example, in conjunction with numerical description, parallel can refer to the included angle between two straight lines in the range of 180°±10°, parallel can also refer to the dihedral angle between two planes in the range of 180°±10°, and parallel can also refer to the included angle between a straight line and a plane in the range of 180°±10°. The two components described as "parallel" can not be absolute straight lines or planes, and can be approximately straight lines or planes, and as a whole, the overall extension direction is considered to be a "straight line" or a "plane".

[0038] Unless otherwise defined, the term "a plurality" herein, when used to describe the number of components, specifically refers to two or more of the components.

[0039] The technical features involved in different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0040] For the convenience of understanding, the English abbreviations and related technical terms involved in the embodiments of the application are explained and described below.

[0041] DC: Di rect Current, i.e. direct current. AC: Alternat i ng Current, i.e. alternating current.

[0042] DC-DC means direct current to direct current, i.e. input direct current and output direct current.

[0043] AC-DC means alternating current to direct current.

[0044] 01-

[0045] Referring to Figures 1 to 8 In one embodiment of the present application, a battery charging device 01 is provided, which comprises a battery charging device body 1. The battery charging device body 1 is configured to supplement power for a battery pack.

[0046] In some embodiments, as shown in Figure 2 The battery pack comprises a shell 021 and a battery cell assembly (not shown) arranged in the shell 021.

[0047] In some embodiments, as shown in Figure 2 and Figure 3 The shell 021 comprises a front wall 0211, a rear wall 0212, a left wall 0213, a right wall 0214, a bottom wall 0215 and a top wall 0216. The left wall 0213 and the right wall 0214 are arranged along a first direction X, the front wall 0211 and the rear wall 0212 are arranged along a second direction Y, and the bottom wall 0215 and the top wall 0216 are arranged along a third direction Z. The front wall 0211 connects the left wall 0213 and the right wall 0214, the rear wall 0212 connects the left wall 0213 and the right wall 0214, and the bottom wall 0215 and the top wall 0216 connect the front wall 0211, the rear wall 0212, the left wall 0213 and the right wall 0214, respectively, to form a containing space. The battery cell assembly is arranged in the containing space.

[0048] In some embodiments, the third direction Z, the second direction Y and the first direction X are perpendicular to each other.

[0049] In some embodiments, at least one of the front wall 0211, the rear wall 0212, the left wall 0213, the right wall 0214, the bottom wall 0215 and the top wall 0216 comprises a heat-conducting material, which can improve the heat dissipation performance. Exemplarily, the heat-conducting material comprises aluminum.

[0050] In some embodiments, the battery charging device body 1 comprises a power conversion module (not shown). A power supply (not shown) is connected to the power conversion module and supplies power to the battery pack through the power conversion module, wherein the power conversion module is used to convert the power input by the power supply into direct current required by the battery pack.

[0051] In some embodiments, the power conversion module is a module capable of realizing power conversion function. The power conversion module can realize DC-DC conversion and / or AC-DC conversion. As such power conversion modules, a current transformer or other power conversion devices can be listed, wherein the current transformer comprises a direct current transformer (DC-DC) and / or a rectifier (AC-DC).

[0052] In some embodiments, the power supply comprises a generator, solar energy, wind energy, a battery, etc. Exemplarily, the power supply is a power grid.

[0053] In some embodiments, asFigure 1 or Figure 2 As shown in FIG. 1A, the battery charging device body 1 includes a battery compartment 1a. When the battery charging device body 1 is charging the battery pack, at least part of the battery pack is placed in the battery compartment 1a.

[0054] In some embodiments, a power conversion module is provided in the battery charging device body 1 and outside the battery compartment 1a.

[0055] In some embodiments, as shown in FIG. 1A, the battery compartment 1a is shaped and sized to fit at least part of the battery pack. For example, the battery compartment 1a is shaped and sized to fit at least part of the battery pack except the top wall 0216 of the part of the housing 021. Figure 1 or Figure 2 As shown in FIG. 1A, the battery compartment 1a is shaped and sized to fit at least part of the battery pack. For example, the battery compartment 1a is shaped and sized to fit at least part of the battery pack except the top wall 0216 of the part of the housing 021.

[0056] In some embodiments, as shown in FIG. 1A, the battery charging device body 1 includes a first cooling assembly 2. The first cooling assembly 2 is configured to cool the battery pack when the battery pack is placed in the battery compartment 1a. Figure 3 and Figure 4 In some embodiments, as shown in FIG. 1A, the battery charging device body 1 includes a first cooling assembly 2. The first cooling assembly 2 is configured to cool the battery pack when the battery pack is placed in the battery compartment 1a. Figure 1 and Figure 2 In some embodiments, as shown in FIG. 1A, the battery charging device body 1 includes a first cooling assembly 2. The first cooling assembly 2 is configured to cool the battery pack when the battery pack is placed in the battery compartment 1a.

[0057] In some embodiments, as shown in FIG. 1A, the first cooling assembly 2 includes a first semiconductor refrigeration sheet 21. The first semiconductor refrigeration sheet 21 includes a first cold end 211 exposed in the battery compartment 1a. The first cold end 211 is configured to be at least partially thermally connected with the battery pack to cool the battery pack when the battery pack is placed in the battery compartment 1a. Figure 3 In some embodiments, as shown in FIG. 1A, the first cooling assembly 2 includes a first semiconductor refrigeration sheet 21. The first semiconductor refrigeration sheet 21 includes a first cold end 211 exposed in the battery compartment 1a. The first cold end 211 is configured to be at least partially thermally connected with the battery pack to cool the battery pack when the battery pack is placed in the battery compartment 1a.

[0058] Thermal connection includes contact connection and connection through other heat-conducting structural members, including but not limited to heat-conducting pads, such as heat-conducting pads with a thermal conductivity coefficient of 0.8-3.0 W / (m·K) at 25℃.

[0059] The battery charging device body 1 according to the present application arranges the cold end of the semiconductor refrigeration sheet in the battery compartment 1a, and the semiconductor refrigeration sheet can accurately control the refrigeration effect by adjusting the current size, so that the battery pack is in a stable temperature range during charging, thereby improving the use performance and service life of the battery pack.

[0060] In some embodiments, the battery charging device body 1 provides power for the first semiconductor refrigeration sheet.

[0061] Optionally, the battery charging device body 1 includes a power supply control module (not shown). The first semiconductor refrigeration sheet 21 and the battery charging device body 1 are both electrically connected to the power supply through the power supply control module. For example, the first semiconductor refrigeration sheet 21 and the battery charging device body 1 are connected in parallel and then connected in series with the power supply control module.

[0062] When the battery pack is placed in the battery compartment 1a, the battery pack is charged while being cooled to reduce the temperature generated during charging, thereby improving the performance and service life of the battery pack.

[0063] In some embodiments, referring to Figure 2 and Figure 3 , the first cold end 211 is configured to be at least partially thermally connected to the bottom wall 0215 when the battery pack is placed in the battery compartment 1a.

[0064] Optionally, the first semiconductor refrigeration sheet 21 is located in the battery compartment 1a and connected to the battery pack charging device body 1. For example, the first semiconductor refrigeration sheet 21 is located at the bottom of the battery compartment 1a and fixedly attached to the part of the battery pack charging device body 1 located in the battery compartment 1a. The first cold end 211 faces the opening of the battery compartment 1a.

[0065] Alternatively, in other embodiments, the first cold end 211 is detachably connected to the battery pack charging device body 1. For example, the battery pack charging device body 1 includes a recess at the bottom of the battery compartment 1a, and the first semiconductor refrigeration sheet 21 is embedded in the recess. The first cold end 211 faces the opening of the battery compartment 1a.

[0066] When the charging temperature of the battery pack is higher than the ambient temperature (for example, in an area with low air temperature), removing the first cooling assembly 2 can improve the portability of the battery pack charging device body 1.

[0067] In some embodiments, as shown in Figure 3 , the first semiconductor refrigeration sheet 21 includes a first hot end 212. The first hot end 212 and the first cold end 211 are oppositely arranged along the thickness direction of the first semiconductor refrigeration sheet 21.

[0068] In some embodiments, the first hot end 212 is configured to exchange heat with the external environment. Optionally, the first cooling assembly 2 includes a first liquid cooling plate 22. The first liquid cooling plate 22 is connected to the first hot end 212, the first liquid cooling plate 22 is at least partially thermally connected to the first hot end 212, and the first liquid cooling plate 22 guides the heat generated by the hot end to the external environment for heat dissipation.

[0069] For example, the first liquid cooling plate 22 includes a flow channel (not shown) for the flow of fluid medium. The heat generated by the hot end can be carried away by the fluid medium, and the cooling effect of the first semiconductor refrigeration sheet 21 is better. As such fluid medium, water or refrigerant can be listed. Among them, the refrigerant has multiple choices, which meets the requirement of being easy to have phase change reaction at high temperature and having high latent heat of vaporization.

[0070] In some embodiments, as shown in Figure 1 and Figure 2As shown, the first liquid cooling plate 22 forms a circulation loop with the cold source 4 through a pipeline (not shown). Exemplarily, the fluid medium is water, and the cold source 4 is a water storage tank. The flow channel of the first liquid cooling plate 21 forms a circulation loop with the water storage tank through a pipeline. The fluid medium in the flow channel that has been heated and has a high temperature enters the water storage tank through a pipeline for heat exchange and cooling. The fluid medium in the water storage tank that has been cooled reenters the flow channel through another pipeline, and the fluid medium continuously repeats this circulation process.

[0071] In some embodiments, as shown in FIG. 1, the battery pack charging device body 1 includes a first liquid cooling plate 22 and a first heat end 212. Figure 4 As shown, the first liquid cooling plate 22 includes a first liquid inlet 22a and a first liquid outlet 22b. The first liquid inlet 22a and the first liquid outlet 22b form a circulation loop with the cold source 4 through respective pipelines.

[0072] Exemplarily, the first liquid inlet 22a and the first liquid outlet 22b are located on the same side of the first liquid cooling plate 22. The first liquid inlet 22a is in communication with one end of the flow channel, and the first liquid outlet 22b is in communication with the other end of the flow channel. The first liquid inlet 22a is in communication with the cold source 4 through a pipeline, and the first liquid outlet 22b is in communication with the cold source 4 through another pipeline. The first liquid inlet 22a and the first liquid outlet 22b are on the same side of the first liquid cooling plate 22, which can reduce the complexity of pipeline layout.

[0073] In some embodiments, as shown in FIG. 1, the battery pack charging device body 1 includes a first liquid cooling plate 22 and a first heat end 212. Figure 4 As shown, the first liquid inlet 22a and the first liquid outlet 22b are located on the side of the first liquid cooling plate 22 away from the first semiconductor refrigeration fin 21.

[0074] In some embodiments, the flow channel of the first liquid cooling plate 22 is serpentine. Exemplarily, the first liquid inlet 22a is in communication with one end of the serpentine flow channel, and the first liquid outlet 22b is in communication with the other end of the serpentine flow channel. The serpentine flow channel increases the heat exchange area of the first liquid cooling plate 22 and the first heat end 212, which helps to improve the heat conduction efficiency of the first liquid cooling plate 22.

[0075] In some embodiments, the battery pack charging device body 1 includes a first heat-conducting adhesive (not shown). The first heat-conducting adhesive bonds the first liquid cooling plate 22 and the first heat end 212. The heat generated by the first heat end 212 can be quickly transferred to the first liquid cooling plate 22, improving the heat conduction efficiency.

[0076] As materials for making the first heat-conducting adhesive, at least one of polyurethane, epoxy resin, polybutadiene rubber, and silicone can be listed. Exemplarily, the first heat-conducting adhesive is heat-conducting silicone grease, which has stable heat conduction performance and can still maintain good heat dissipation effect under high-temperature operation.

[0077] In some embodiments, as shown in FIG. 1, the battery pack charging device body 1 includes a first liquid cooling plate 22 and a first heat end 212. Figure 3As shown, the number of the first semiconductor refrigeration pieces 21 is two, and the two first semiconductor refrigeration pieces 21 are arranged at intervals in the first direction X. Optionally, the first cold ends 211 of the two first semiconductor refrigeration pieces 21 are exposed in the battery compartment la. In the first direction X, the two first semiconductor refrigeration pieces 21 are arranged at intervals, and the electrical connection ends of the two first semiconductor refrigeration pieces 21 are arranged opposite to each other. The first liquid cooling plate 22 is arranged at the first hot ends 212 of the two first semiconductor refrigeration pieces 21. Exemplarily, a first heat-conducting adhesive is used to bond the first liquid cooling plate 22 and the first hot ends 212 of the first semiconductor refrigeration pieces.

[0078] The two first semiconductor refrigeration pieces 21 are arranged to correspond to the positions of the first and second battery cell assemblies 022 and 023 of the battery pack, and are designed to cool the two heat sources of the battery pack, thereby reducing the local overheating of the battery pack during charging.

[0079] In some embodiments, please refer to Figure 5 and Figure 6 together, Figure 1 and Figure 2 , the battery pack charging device body 1 comprises a second cooling assembly 3. The second cooling assembly 3 is configured to cool the battery pack when the battery pack is placed in the battery compartment la.

[0080] In some embodiments, as shown in Figure 5 and Figure 6 , the second cooling assembly 3 comprises a second semiconductor refrigeration piece 31 and a first heat transfer plate 32. The second semiconductor refrigeration piece 31 comprises a second cold end 311 arranged in the battery compartment la. The first heat transfer plate 32 is connected to the second cold end 311, and the first heat transfer plate 32 is exposed to the battery compartment la. The first heat transfer plate 32 is configured to be at least partially thermally connected to the battery pack to cool the battery pack when the battery pack is placed in the battery compartment la. Exemplarily, in the first direction X, the second cooling assembly 3 is located on the adjacent side of the first cooling assembly 2, and the first heat transfer plate 32 is closer to the side of the first cooling assembly 2 relative to the second semiconductor refrigeration piece 31. The first heat transfer plate 32 is configured to be at least partially thermally connected to the left wall 0213 or the right wall 0214 when the battery pack is placed in the battery compartment.

[0081] In the first direction X, the gap between the battery pack of different specifications and the second cold end 311 is not the same, and the second cold end 311 is connected to the battery pack through the first heat transfer plate 32, which can further reduce the local overheating of the battery pack during charging and improve the adaptability of the battery pack charging device body 1.

[0082] In some embodiments, the first heat transfer plate 32 comprises a heat-conducting material, which can improve the heat transfer performance. Exemplarily, the heat-conducting material comprises aluminum.

[0083] In some embodiments, the second cooling assembly 3 and the battery pack charging device body 1 share the same power supply. Exemplarily, the second semiconductor refrigeration sheet 31 and the battery pack charging device body 1 are connected in parallel and then connected in series with the power supply control module.

[0084] When the battery pack is placed in the battery compartment 1a, the battery pack can be charged while the temperature generated during charging is cooled, further improving the performance and service life of the battery pack.

[0085] In some embodiments, as shown in Figure 5 or Figure 6 , the second semiconductor refrigeration sheet 31 includes a second hot end 312. The second hot end 312 and the second cold end 311 are oppositely arranged along the thickness direction of the second semiconductor refrigeration sheet 31.

[0086] In some embodiments, the second hot end 312 is configured to exchange heat with the external environment. Optionally, the second cooling assembly 3 includes a second liquid cooling plate 33. The second liquid cooling plate 33 is arranged at the second hot end 312, the second liquid cooling plate 33 is at least partially in contact with the second hot end 312, and the second liquid cooling plate 33 guides the heat generated by the hot end to the external environment to complete heat dissipation.

[0087] Exemplarily, the second liquid cooling plate 33 includes a flow channel for the flow of fluid medium. The heat generated by the hot end can be taken away by the fluid medium, and the cooling effect of the second semiconductor refrigeration sheet 31 is better. As such fluid medium, water or refrigerant can be listed. Among them, the refrigerant has multiple choices, which meets the requirement of easy phase change reaction at high temperature and high latent heat of vaporization.

[0088] In some embodiments, as shown in Figure 1 or Figure 2 , the second liquid cooling plate 33 is connected to the cold source 4 through a pipeline to form a circulation loop. Exemplarily, the fluid medium is water, and the cold source 4 is a water storage tank. The flow channel forms a circulation loop with the water storage tank through the pipeline. The fluid medium in the flow channel that has been heated and has a higher temperature enters the water storage tank through a pipeline for heat exchange and cooling, and the fluid medium in the water storage tank that has been cooled reenters the flow channel through another pipeline, and the fluid medium continues to repeat this circulation process.

[0089] In some embodiments, as shown in Figure 5 or Figure 6 , the second liquid cooling plate 33 includes a second liquid inlet 33a and a second liquid outlet 33b. The second liquid inlet 33a and the second liquid outlet 33b are respectively connected to the cold source 4 through respective pipelines to form a circulation loop.

[0090] Exemplarily, the second liquid inlet 33a and the second liquid outlet 33b are located on the same side of the second liquid cooling plate 33. The second liquid inlet 33a is in communication with one end of the flow channel of the second liquid cooling plate 33, and the second liquid outlet 33b is in communication with the other end of the flow channel of the second liquid cooling plate 33. The second liquid inlet 33a is in communication with the cold source 4 through a pipeline, and the second liquid outlet 33b is in communication with the cold source 4 through another pipeline. The second liquid inlet 33a and the second liquid outlet 33b are on the same side of the second liquid cooling plate 33, which can reduce the complexity of pipeline layout.

[0091] In some embodiments, as shown in Figure 5 or Figure 6 Exemplarily, the second liquid inlet 33a and the second liquid outlet 33b are located on the same side of the second liquid cooling plate 33. The second liquid inlet 33a is in communication with one end of the flow channel of the second liquid cooling plate 33, and the second liquid outlet 33b is in communication with the other end of the flow channel of the second liquid cooling plate 33. The second liquid inlet 33a is in communication with the cold source 4 through a pipeline, and the second liquid outlet 33b is in communication with the cold source 4 through another pipeline. The second liquid inlet 33a and the second liquid outlet 33b are on the same side of the second liquid cooling plate 33, which can reduce the complexity of pipeline layout.

[0092] In some embodiments, the flow channel of the second liquid cooling plate 33 is in a serpentine shape. Exemplarily, the second liquid inlet 33a is in communication with one end of the serpentine flow channel, and the second liquid outlet 33b is in communication with the other end of the serpentine flow channel. The serpentine flow channel increases the heat exchange area of the second liquid cooling plate 33 and the second hot end 312, which helps to improve the heat conduction efficiency of the second liquid cooling plate 33.

[0093] In some embodiments, the battery pack charging device body 1 comprises a second heat-conducting adhesive (not shown in the figure). The second heat-conducting adhesive bonds the second liquid cooling plate 33 and the second hot end 312. The heat generated by the second hot end 312 can be quickly transferred to the second liquid cooling plate 33, improving the heat conduction efficiency.

[0094] As the material for making the second heat-conducting adhesive, at least one of polyurethane, epoxy resin, polybutadiene rubber, and silicone can be listed. Exemplarily, the second heat-conducting adhesive is a heat-conducting silicone grease, which has relatively stable heat-conducting performance and can still maintain good heat dissipation effect under high-temperature operation.

[0095] In some embodiments, as shown in Figure 6 The number of the second semiconductor Peltier plates 31 is two, and the two second semiconductor Peltier plates 31 are spaced apart in the third direction Z. Alternatively, the second cold ends 311 of the two second semiconductor Peltier plates 31 are located in the battery compartment 1a. The two second semiconductor Peltier plates 31 are spaced apart in the third direction Z, and the electrical connection ends of the two second semiconductor Peltier plates 31 are arranged opposite to each other. The second liquid cooling plate 33 is arranged at the second hot ends 312 of the two second semiconductor Peltier plates 31. Exemplarily, a second heat-conducting adhesive bonds the second liquid cooling plate 33 and the second hot end 312 of one second semiconductor.

[0096] The two second semiconductor Peltier plates 31 correspond to the positions of the first cell assemblies 022 of the battery pack, and the cooling design is performed by aligning one of the heat sources of the battery pack, which further reduces the local overheating of the battery pack during charging.

[0097] In some embodiments, in the third direction Z, the third direction Z and a direction opposite to the third direction Z are included.

[0098] In some embodiments, please refer to Figure 7 and Figure 8 together with Figure 1 and the figures, the battery charging device body 1 includes two second cooling assemblies 3, which are located on opposite sides of the battery pack, one of which is in thermal connection with the left wall 0213, and the other is in thermal connection with the right wall 0214, which enhances the cooling of the battery pack.

[0099] In some embodiments, the battery charging device body 1 includes a pump (not shown in the figure). A circulation loop is formed between the first liquid cooling plate 22, the second liquid cooling plate 33, the pump, and the cold source 4.

[0100] In some embodiments, the two second semiconductor refrigeration sheets 31 of the second cooling assembly 3 and one first semiconductor refrigeration sheet 21 of the first cooling assembly 2 are connected in parallel and then connected in series with the power supply control module through a connector.

[0101] In some embodiments, the two third semiconductor refrigeration sheets 41 of the third cooling assembly 4 and the other first semiconductor refrigeration sheet 21 of the first cooling assembly 2 are connected in parallel and then connected in series with the power supply control module through another connector.

[0102] Based on the same technical concept, one of the embodiments of the present application provides a battery charging device, which includes the battery charging device 01 provided by any of the above embodiments and a battery pack. The battery pack is electrically connected to the battery charging device body 1 and receives the electrical energy provided by the battery charging device body 1.

[0103] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation based on the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A battery pack charging device characterized by comprising: The battery charging device comprises: a battery charging device body comprising a battery compartment; a first cooling assembly comprising a first semiconductor refrigeration sheet, the first semiconductor refrigeration sheet comprising a first cold end exposed to the battery compartment, the first cold end being configured to be at least partially thermally connected to the battery when the battery is placed in the battery compartment.

2. The battery pack charging device according to claim 1, characterized by, The first semiconductor refrigeration sheet comprises a first hot end; The first cooling assembly comprises a first liquid cooling plate; the first liquid cooling plate is connected to the first hot end, and the first liquid cooling plate comprises a flow channel that forms a circulation loop in communication with a cold source through a pipeline.

3. The battery pack charging device according to claim 2, characterized by, The first liquid cooling plate comprises a first liquid inlet and a first liquid outlet; the first liquid inlet is in communication with one end of the flow channel, and the first liquid outlet is in communication with the other end of the flow channel. The first liquid inlet and the first liquid outlet are respectively in communication with the cold source through respective pipelines to form a circulation loop.

4. The battery pack charging device according to claim 2, characterized by The battery charging device provides electrical energy for the first semiconductor refrigeration sheet.

5. The battery pack charging device according to claim 2, wherein The number of the first semiconductor refrigeration sheets is two, and the two first semiconductor refrigeration sheets are arranged at intervals, and the first liquid cooling plate is arranged at the first hot ends of the two first semiconductor refrigeration sheets.

6. The battery pack charging device according to any one of claims 2 to 5, characterized by, The battery charging device comprises a first heat-conducting adhesive, and the first heat-conducting adhesive bonds the first liquid cooling plate and the first hot end.

7. The battery pack charging device according to any one of claims 2 to 5, characterized by, The battery comprises a bottom wall; The first cold end is configured to be at least partially thermally connected to the bottom wall when the battery is placed in the battery compartment.

8. The battery pack charging apparatus according to any one of claims 1 to 5, characterized by, The battery charging device comprises a second cooling assembly; the second cooling assembly comprises a second semiconductor refrigeration sheet and a first heat transfer plate; The second semiconductor refrigeration sheet comprises a second cold end, and the first heat transfer plate is connected to the second cold end and exposed to the battery compartment, and the first heat transfer plate is configured to be at least partially thermally connected to the battery when the battery is placed in the battery compartment.

9. The battery pack charging device according to claim 8, wherein The battery comprises a left wall and a right wall; The first heat transfer plate is configured to be at least partially thermally connected to the left wall or at least partially thermally connected to the right wall when the battery is placed in the battery compartment.

10. A battery pack charging apparatus characterized by comprising: A battery and a battery charging device as claimed in any one of claims 1-9 are provided, and the battery charging device is used to provide electrical energy for the battery.

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