Battery module and battery pack
By using a combination of thermally conductive components and thermoelectric effect parts in the battery module, the problem of poor heat dissipation performance of traditional battery packs is solved, achieving more efficient heat dissipation effects and a wider environmental adaptation range.
Patent Information
- Application Number
- CN202420603572.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The traditional battery pack has poor heat dissipation performance, which cannot meet normal operation of high-power loads, and has a small environmental adaptation range.
The combination of thermal conductivity and thermoelectric effect parts is adopted to direct the heat generated by the battery cell assembly to the outer edge by introducing current, achieving uniform heat dissipation and improving heat dissipation efficiency through integrated heat dissipation.
The temperature uniformity, charging and dissipation performance and heat dissipation effect of the battery module are improved, making it suitable for high-power load operations, and the environmental adaptation range is expanded.
Smart Images
Figure CN222654044U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery heat dissipation technology, and in particular to a battery module and a battery pack. Background Art
[0002] Energy storage batteries such as lithium batteries are widely used in electric passenger cars, commercial vehicles and other electrical equipment due to their high energy density, small size and long cycle life. However, lithium batteries generate a lot of heat during the charging and discharging process, which causes the internal temperature to rise, thus affecting their own performance and even causing accidents such as spontaneous combustion and explosion due to thermal runaway. Therefore, it is urgent to improve the heat dissipation performance of lithium batteries.
[0003] In the related art, the heat dissipation of the battery pack is generally carried out by air cooling or liquid cooling. However, the conventional air cooling system has a simple structure and limited heat dissipation effect, and cannot meet the normal operation of high-power loads; the liquid cooling system has high heat exchange efficiency, but its heat dissipation capacity is limited by the ambient temperature, and the battery pack has a small environmental adaptability range. Utility Model Content
[0004] The present application provides a battery module and a battery pack to solve the technical problems that traditional battery packs have poor heat dissipation performance, cannot meet the normal operation of high-power loads, and have a small environmental adaptability range.
[0005] To this end, in the first aspect, an embodiment of the present application provides a battery module, which includes: a battery cell assembly, having a first heat dissipation surface and a second heat dissipation surface arranged opposite to each other; a heat-conducting assembly, including a first heat-conducting member arranged on the first heat dissipation surface and a second heat-conducting member arranged on the second heat dissipation surface; a first thermoelectric effect member, arranged on a side of the first heat-conducting member away from the first heat dissipation surface, the first cold end of the first thermoelectric effect member is connected to the first heat-conducting member, and the first hot end of the first thermoelectric effect member is used to connect to the first side wall of the battery pack box; and a second thermoelectric effect member, arranged on a side of the second heat-conducting member away from the second heat dissipation surface, the second cold end of the second thermoelectric effect member is connected to the second heat-conducting member, and the second hot end of the second thermoelectric effect member is used to connect to the second side wall of the box.
[0006] In a possible implementation, the first thermoelectric effect element includes a first ceramic, a first temperature difference thermocouple pair, a first conductor and a second ceramic, the first temperature difference thermocouple pair is respectively connected to the first ceramic and the second ceramic through the first conductor, the first cold end is the first ceramic, and the first hot end is the second ceramic; and / or,
[0007] The second thermoelectric effect element includes a third ceramic, a second temperature difference thermocouple pair, a second conductor and a fourth ceramic. The second temperature difference thermocouple pair is respectively connected to the third ceramic and the fourth ceramic through the second conductor. The second cold end is the third ceramic, and the second hot end is the fourth ceramic.
[0008] In a possible implementation, the first heat conductor includes a first abutting surface, the first abutting surface is located on a side of the first heat conductor away from the first heat dissipation surface, the first cold end includes a second abutting surface abutting the first abutting surface, and the first abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex hull surface, or a multi-groove surface; and / or,
[0009] The second heat conducting member includes a third abutting surface, which is located on a side of the second heat conducting member away from the second heat dissipation surface. The second cold end includes a fourth abutting surface abutting the third abutting surface. The third abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex hull surface or a multi-groove surface.
[0010] In a possible implementation, the first hot end includes a fifth abutting surface abutting against the first side wall, and the fifth abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex surface or a multi-groove surface; and / or,
[0011] The sixth abutting surface where the second hot end abuts against the second side wall is any one of a plane, a convex surface, a concave surface, a multi-convex surface or a multi-groove surface.
[0012] In a possible implementation, the first heat-conducting member includes a first heat-conducting plate and a plurality of first heat-conducting columns, the plurality of first heat-conducting columns are arranged at intervals on the same side of the first heat-conducting plate, the first heat-conducting columns are plugged into the battery core assembly, the first heat-conducting plate is connected to the battery core assembly through the plurality of first heat-conducting columns, and is pressed against the first heat dissipation surface; and / or,
[0013] The second heat-conducting member includes a second heat-conducting plate and a plurality of second heat-conducting columns, the plurality of second heat-conducting columns are arranged at intervals on the same side of the second heat-conducting plate, the second heat-conducting columns are plugged into the battery cell assembly, the second heat-conducting plate is connected to the battery cell assembly through the plurality of second heat-conducting columns, and is pressed against the second heat dissipation surface.
[0014] In a possible implementation, the heat conducting assembly further includes a first silicone pad and a second silicone pad, the first silicone pad is disposed between the first heat dissipation surface and the first heat conducting member, and the second silicone pad is disposed between the second heat dissipation surface and the second heat conducting member.
[0015] In a second aspect, the present application also provides a battery pack, comprising:
[0016] The box body has a first side wall and a second side wall which are arranged opposite to each other;
[0017] A box cover, which covers the box body and forms a closed containing cavity together with the box body; and
[0018] As described above, the battery module is arranged in a sealed accommodating chamber, the first hot end of the first thermoelectric effect element of the battery module abuts against the first side wall, and the second hot end of the second thermoelectric effect element of the battery module abuts against the second side wall.
[0019] In a possible implementation, the first side wall is any one of a flat surface, a serrated surface, a concave surface or a convex surface; and / or,
[0020] The second side wall is any one of a flat surface, a serrated surface, a concave surface or a convex surface.
[0021] In a possible implementation, the battery pack is formed by a potting process.
[0022] In a possible implementation, a plurality of battery modules are provided, and the plurality of battery modules are overlapped and arranged in a closed accommodating cavity along the length direction of the box body.
[0023] In a possible implementation manner, a third thermoelectric effect element is further included, and the third thermoelectric effect element is arranged on opposite sides of the battery module along the length direction of the box body.
[0024] According to the battery module and battery pack provided by the embodiment of the present application, a first thermoelectric effect component and a second thermoelectric effect component are added to the outside of the heat-conducting component, and current is introduced into the first thermoelectric effect component and the second thermoelectric effect component so that the heat generated at the battery cell assembly is directed from the inside of the battery cell assembly to its outer edge, thereby achieving uniform heat dissipation of the battery module and improving the temperature uniformity, charging and discharging performance and heat dissipation effect of the battery module; at the same time, through the integrated heat dissipation method combining the heat-conducting component with the first thermoelectric effect component and the second thermoelectric effect component, the heat dissipation efficiency of the battery cell assembly is further improved, so that the battery module can be applied to the heat dissipation requirements of high-power load operations, thereby improving the scope of application of the battery module. In addition, compared with the traditional liquid cooling heat dissipation method, the heat transfer operation of the first thermoelectric effect component and the second thermoelectric effect component is not limited by the ambient temperature. The environmental adaptability range of the battery module provided by the embodiment of the present application is wider and there are more application scenarios. Specifically, the battery module is configured as a combination component including at least a battery cell assembly, a heat conductive component, a first thermoelectric effect component and a second thermoelectric effect component. The heat conductive component is configured as a combination component including at least a first heat conductive component and a second heat conductive component. The first heat conductive component is configured at the first heat dissipation surface of the battery cell assembly, and the first thermoelectric effect component is configured on the outside of the first heat conductive component. At the same time, the second heat conductive component is configured at the second heat dissipation surface of the battery cell assembly, and the second thermoelectric effect component is configured on the outside of the second heat conductive component. In this way, a heat conductive heat transfer system is formed on opposite sides of the battery cell assembly through the first heat conductive component and the first thermoelectric effect component, the second heat conductive component and the second thermoelectric effect component. The heat conductive heat transfer system can transfer the heat generated by the battery cell assembly to the first hot end and the second hot end respectively, and at least on both sides of the battery cell assembly, uniform heat dissipation is achieved simultaneously, thereby improving heat dissipation efficiency and heat dissipation effect. At the same time, the first hot end and the second hot end are both abutted against the inner wall of the battery pack box. In this way, heat can be further transferred from the first hot end and the second hot end to the box, and then transferred to the environment outside the box, thereby achieving heat dissipation of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments that conform to the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can also be obtained based on these drawings without paying creative labor. One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation.
[0026] Figure 1 An exploded view of a battery module provided in an embodiment of the present application;
[0027] Figure 2 A schematic diagram of the structure of the first thermoelectric effect element / the second thermoelectric effect element of the battery module provided in an embodiment of the present application;
[0028] Figure 3 An exploded view of a battery pack provided in an embodiment of the present application;
[0029] Figure 4 A cross-sectional view of a battery pack provided in an embodiment of the present application.
[0030] Description of reference numerals:
[0031] 100, battery cell assembly; 101, first heat dissipation surface; 102, second heat dissipation surface;
[0032] 200, heat-conducting component; 201, first abutting surface; 202, third abutting surface; 210, first heat-conducting member; 211, first heat-conducting plate; 212, first heat-conducting column; 220, second heat-conducting member; 221, second heat-conducting plate; 222, second heat-conducting column; 230, first silicone pad; 240, second silicone pad;
[0033] 300, first thermoelectric effect element; 301, second abutting surface; 302, fifth abutting surface; 310, first ceramic sheet; 320, first temperature difference thermocouple pair; 330, first conductor; 340, second ceramic sheet; 350, first cable group;
[0034] 400, second thermoelectric effect element; 401, fourth abutting surface; 402, sixth abutting surface; 410, third ceramic sheet; 420, second temperature difference thermocouple pair; 430, second conductor; 440, fourth ceramic sheet; 450, second cable assembly;
[0035] 10. Box body; 11. First side wall; 12. Second side wall; 20. Box cover; 30. Battery module; 40. Third thermoelectric effect element;
[0036] Y, length direction. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0038] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can appreciate the applicability of other processes and / or the use of other materials.
[0039] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.
[0040] See also Figure 1 Figure 2 and Figure 4The embodiment of the present application provides a battery module 30, which includes: a battery cell assembly 100, having a first heat dissipation surface 101 and a second heat dissipation surface 102 arranged opposite to each other; a heat-conducting assembly 200, including a first heat-conducting member 210 arranged on the first heat dissipation surface 101 and a second heat-conducting member 220 arranged on the second heat dissipation surface 102; a first thermoelectric effect member 300, arranged on a side of the first heat-conducting member 210 away from the first heat dissipation surface 101, a first cold end of the first thermoelectric effect member 300 is connected to the first heat-conducting member 210, and a first hot end of the first thermoelectric effect member 300 is used to connect to the first side wall 11 of the box 10 of the battery pack; and a second thermoelectric effect member 400, arranged on a side of the second heat-conducting member 220 away from the second heat dissipation surface 102, a second cold end of the second thermoelectric effect member 400 is connected to the second heat-conducting member 220, and a second hot end of the second thermoelectric effect member 400 is used to connect to the second side wall 12 of the box 10.
[0041] In this embodiment, a first thermoelectric effect element 300 and a second thermoelectric effect element 400 are added to the outside of the heat conductive component 200. By introducing current into the first thermoelectric effect element 300 and the second thermoelectric effect element 400, the heat generated at the battery cell assembly 100 is transferred from the inside of the battery cell assembly 100 to its outer edge, thereby achieving uniform heat dissipation of the battery module 30, improving the temperature uniformity, charging and discharging performance and heat dissipation effect of the battery module 30; at the same time, through the integrated heat dissipation method combining the heat conductive component 200 with the first thermoelectric effect element 300 and the second thermoelectric effect element 400, the heat dissipation efficiency of the battery cell assembly 100 is further improved, so that the battery module 30 can be applied to the heat dissipation requirements of high-power load operations, and the application range of the battery module 30 is improved. In addition, compared with the traditional liquid cooling heat dissipation method, the heat transfer operation of the first thermoelectric effect element 300 and the second thermoelectric effect element 400 is not limited by the ambient temperature. The battery module 30 provided in the embodiment of the present application has a wider environmental adaptability range and more application scenarios.
[0042] Specifically, the battery module 30 is configured as a composite component including at least a battery cell assembly 100, a heat conductive assembly 200, a first thermoelectric effect element 300 and a second thermoelectric effect element 400. The heat conductive assembly 200 may be a high thermal conductivity material, such as copper or aluminum, and is configured as a composite component including at least a first heat conductive element 210 and a second heat conductive element 220. The first heat conductive element 210 may be a copper / aluminum component, which is disposed at the first heat dissipation surface 101 of the battery cell assembly 100, and is used to transfer the heat at the first heat dissipation surface 101 to the outside of the first heat conductive element 210; the first thermoelectric effect element 300 may be a semiconductor thermoelectric material sheet component made of bismuth telluride, which is disposed at the outside of the first heat conductive element 210, so that the heat outside the first heat conductive element 210 can be transferred to its first hot end through the first thermoelectric effect element 300, so as to realize the heat transfer from the inside to the outside of the first heat dissipation surface 101 of the battery cell assembly 100. At the same time, the second heat-conducting member 220 can be a copper / aluminum component, which is arranged at the second heat dissipation surface 102 of the battery cell assembly 100, and is used to transfer the heat at the second heat dissipation surface 102 to the outside of the second heat-conducting member 220; the second thermoelectric effect member 400 can be a semiconductor thermoelectric material sheet component made of bismuth telluride, which is arranged on the outside of the second heat-conducting member 220. In this way, the heat on the outside of the second heat-conducting member 220 can be transferred to its second hot end through the second thermoelectric effect member 400, thereby realizing heat transfer from the inside to the outside of the second heat dissipation surface 102 side of the battery cell assembly 100. In this way, a heat conduction system can be formed on the opposite sides of the battery cell assembly 100 through the first heat conductor 210 and the first thermoelectric effect element 300, the second heat conductor 220 and the second thermoelectric effect element 400, respectively. The heat conduction system can transfer the heat generated by the battery cell assembly 100 to the first hot end and the second hot end respectively, and achieve heat dissipation on at least both sides of the battery cell assembly 100, thereby improving the heat dissipation efficiency and the heat dissipation effect; at the same time, the first hot end and the second hot end are both abutted against the inner wall of the battery pack case 10, so that the heat can be further transferred from the first hot end and the second hot end to the case 10, and then transferred from the case 10 to the environment outside it, thereby achieving heat dissipation of the battery pack.
[0043] In one example, the battery cell assembly 100 includes a plurality of battery cells and at least two battery holders, and the plurality of battery cells are arranged in the two battery holders. Specifically, the battery holder is provided with a plurality of receiving half-grooves for receiving the battery cells, and after the two ends of the battery cells are respectively inserted into the receiving half-grooves corresponding to the two battery holders, the two battery holders can be connected by external long screws / bolts and other fasteners, thereby realizing the connection and fastening of the battery cell assembly 100.
[0044] In one possible embodiment, the first thermoelectric effect element 300 includes a first ceramic 310, a first temperature difference thermocouple pair 320, a first conductor 330 and a second ceramic 340, the first temperature difference thermocouple pair 320 is respectively connected to the first ceramic 310 and the second ceramic 340 through the first conductor 330, the first cold end is the first ceramic 310, and the first hot end is the second ceramic 340; and / or, the second thermoelectric effect element 400 includes a third ceramic 410, a second temperature difference thermocouple pair 420, a second conductor 430 and a fourth ceramic 440, the second temperature difference thermocouple pair 420 is respectively connected to the third ceramic 410 and the fourth ceramic 440 through the second conductor 430, the second cold end is the third ceramic 410, and the second hot end is the fourth ceramic 440.
[0045] In this embodiment, the specific configuration of the first thermoelectric effect element 300 is optimized. Specifically, the first thermoelectric effect element 300 is configured as a composite component including at least a first ceramic piece 310, a first temperature difference thermocouple pair 320, a first conductor 330 and a second ceramic piece 340. The first ceramic piece 310 is a cold end ceramic piece, and its outer side abuts against the first heat conducting element 210; the second ceramic piece 340 is a hot end ceramic piece, and its outer side abuts against the first side wall 11 of the box body 10. The first temperature difference thermocouple pair 320 can be composed of an equal number of n-type and p-type electric couple arms connected in series, and multiple pairs can be provided. The multiple pairs of first temperature difference thermocouple pairs 320 are connected in series between the first ceramic plate 310 and the second ceramic plate 340 through the first conductor 330; it can be understood that in n-type materials, the direction of heat flow is opposite to the direction of current, and in p-type materials, the direction of heat flow is the same as the direction of current. In this way, the heat flow direction in each pair of temperature difference thermocouple pairs can be the same by providing the same number of n-type and p-type electric couple arms connected in series, so that heat can be transferred in a direction in the first thermoelectric effect element 300. The first conductor 330 can be a metal conductive sheet, which is respectively arranged on the inner side of the first ceramic sheet 310 and the second ceramic sheet 340. The two ends of the first temperature difference thermocouple pair 320 are respectively connected to the corresponding first conductor 330. In this way, a current loop can be formed between the first conductor 330 and the first temperature difference thermocouple pair 320. By adjusting the direction of the current loop, the direction of the heat flow between the first ceramic sheet 310 and the second ceramic sheet 340 can be adjusted.
[0046] The specific configuration of the second thermoelectric effect element 400 is optimized. Specifically, the second thermoelectric effect element 400 is configured as a composite component including at least a third ceramic piece 410, a second temperature difference thermocouple pair 420, a second conductor 430 and a fourth ceramic piece 440. The third ceramic piece 410 is a cold end ceramic piece, and its outer side abuts against the second heat conducting element 220; the fourth ceramic piece 440 is a hot end ceramic piece, and its outer side abuts against the second side wall 12 of the box body 10. The second temperature difference thermocouple pair 420 can be composed of an equal number of n-type and p-type electric couple arms connected in series, and multiple pairs can be provided. The multiple pairs of second temperature difference thermocouple pairs 420 are connected in series between the third ceramic piece 410 and the fourth ceramic piece 440 through the second conductor 430; it can be understood that in n-type materials, the direction of heat flow is opposite to the direction of current, and in p-type materials, the direction of heat flow is the same as the direction of current. In this way, the direction of heat flow in each pair of temperature difference thermocouple pairs can be the same by providing the same number of n-type and p-type electric couple arms connected in series, so that heat can be transferred in a direction in the second thermoelectric effect element 400. The second conductor 430 can be a metal conductive sheet, which is respectively arranged on the inner side of the third ceramic sheet 410 and the fourth ceramic sheet 440. The two ends of the second temperature difference thermocouple pair 420 are respectively connected to the corresponding second conductor 430. In this way, a current loop can be formed between the second conductor 430 and the second temperature difference thermocouple pair 420. By adjusting the direction of the current loop, the heat flow direction between the third ceramic sheet 410 and the fourth ceramic sheet 440 can be adjusted.
[0047] In one example, the first thermoelectric effect element 300 further includes a first cable group 350, the two ends of which are respectively connected to the two outermost first conductors 330 on the second ceramic sheet 340, and are also connected to the power supply. The second thermoelectric effect element 400 further includes a second cable group 450, the two ends of which are respectively connected to the two outermost second conductors 430 on the fourth ceramic sheet 440, and are also connected to the power supply. In this way, the power supply to the first thermocouple pair and the second thermocouple pair is realized, and the heat flow direction in the first thermoelectric effect element 300 and the second thermoelectric effect element 400 is conveniently adjusted.
[0048] In a possible embodiment, the first heat conductor 210 includes a first abutting surface 201, and the first abutting surface 201 is located on the side of the first heat conductor 210 away from the first heat dissipation surface 101. The first cold end includes a second abutting surface 301 abutting against the first abutting surface 201, and the first abutting surface 201 is any one of a plane, a convex surface, a concave surface, a multi-convex hull surface or a multi-groove surface. Such an arrangement can increase the contact area at the connection between the first heat conductor 210 and the first cold end, thereby increasing the heat dissipation area, improving the heat dissipation efficiency and the heat dissipation effect. Specifically, the first abutting surface 201 can be a plane, and in this case, the second abutting surface 301 is also a plane, so as to facilitate processing and reduce production costs. Alternatively, the first abutting surface 201 can be a convex surface or multiple convex surfaces. In this case, the second abutting surface 301 is a concave surface adapted to the convex surface or multiple concave surfaces adapted to the multiple convex surfaces. In this way, the contact area at the connection between the first heat conductor 210 and the first cold end is increased, the heat dissipation area is increased, and the heat dissipation efficiency and heat dissipation effect are improved; at the same time, through the configuration of the convex surface and the concave surface, the connection tightness between the first heat conductor 210 and the first thermoelectric effect sheet can be enhanced, thereby improving the stability of the entire battery module 30.
[0049] Of course, in other embodiments, the first abutting surface 201 can also be a concave surface or multiple concave surfaces. In this case, the second abutting surface 301 is a concave surface adapted to the convex surface, or a multiple convex surface adapted to the multiple concave surfaces. The specific shapes of the first abutting surface 201 and the second abutting surface 301 are not limited here, as long as the two can be tightly abutted against each other.
[0050] In a possible embodiment, the second heat conductor 220 includes a third abutting surface 202, and the third abutting surface 202 is located on the side of the second heat conductor 220 away from the second heat dissipation surface 102. The second cold end includes a fourth abutting surface 401 abutting against the third abutting surface 202, and the third abutting surface 202 is any one of a plane, a convex surface, a concave surface, a multi-convex hull surface, or a multi-groove surface. Such an arrangement can increase the contact area at the connection between the second heat conductor 220 and the second cold end, thereby increasing the heat dissipation area, improving the heat dissipation efficiency and the heat dissipation effect. Specifically, the third abutting surface 202 can be a plane, and in this case, the fourth abutting surface 401 is also a plane, so as to facilitate processing and reduce production costs. Alternatively, the third abutting surface 202 can be a convex surface or multiple convex surfaces. In this case, the fourth abutting surface 401 is a concave surface adapted to the convex surface or multiple concave surfaces adapted to the multiple convex surfaces. In this way, the contact area at the connection between the second heat conductor 220 and the second cold end is increased, the heat dissipation area is increased, and the heat dissipation efficiency and heat dissipation effect are improved. At the same time, through the configuration of the convex surface and the concave surface, the connection tightness between the second heat conductor 220 and the second thermoelectric effect sheet can be enhanced, thereby improving the stability of the entire battery module 30.
[0051] Of course, in other embodiments, the third abutting surface 202 can also be a concave surface or multiple concave surfaces. In this case, the fourth abutting surface 401 is a concave surface adapted to the convex surface, or a multiple convex surface adapted to the multiple concave surfaces. The specific shapes of the third abutting surface 202 and the fourth abutting surface 401 are not limited here, as long as the two can be tightly abutted against each other.
[0052] In a possible embodiment, the first hot end includes a fifth abutting surface 302 abutting against the first side wall 11, and the fifth abutting surface 302 is any one of a plane, a convex surface, a concave surface, a multi-convex surface or a multi-groove surface. Such a configuration can increase the contact area of the connection between the first hot end and the first side wall 11, thereby increasing the heat dissipation area, improving the heat dissipation efficiency and the heat dissipation effect. Specifically, the fifth abutting surface 302 can be a plane, and in this case, the abutting surface of the first side wall 11 is also a plane, so as to facilitate processing and reduce production costs. Alternatively, the fifth abutment surface 302 can be a convex surface or multiple convex surfaces. In this case, the abutment surface of the first side wall 11 is a concave surface adapted to the convex surface or multiple concave surfaces adapted to the multiple convex surfaces. In this way, the contact area at the connection between the first hot end and the first side wall 11 is increased, the heat dissipation area is increased, and the heat dissipation efficiency and heat dissipation effect are improved. At the same time, through the configuration of the convex surface and the concave surface, the connection tightness between the first thermoelectric effect element 300 and the first side wall 11 can be enhanced, thereby improving the stability of the entire battery module 30.
[0053] Of course, in other embodiments, the fifth abutment surface 302 can also be a concave surface or multiple concave surfaces. In this case, the abutment surface of the first side wall 11 is a concave surface that matches the convex surface, or a multiple convex surface that matches the multiple concave surfaces. The specific shapes of the abutment surfaces of the fifth abutment surface 302 and the first side wall 11 are not limited here, as long as the two can be tightly abutted against each other.
[0054] In a possible implementation, the sixth abutting surface 402 where the second hot end abuts against the second side wall 12 is any one of a plane, a convex surface, a concave surface, a multi-convex surface or a multi-groove surface. This arrangement can increase the contact area of the connection between the second hot end and the second side wall 12, thereby increasing the heat dissipation area, improving the heat dissipation efficiency and the heat dissipation effect. Specifically, the sixth abutting surface 402 can be a plane, and in this case, the abutting surface of the second side wall 12 is also a plane, so as to facilitate processing and reduce production costs. Alternatively, the sixth abutment surface 402 can be a convex surface or multiple convex surfaces. In this case, the abutment surface of the second side wall 12 is a concave surface adapted to the convex surface or multiple concave surfaces adapted to the multiple convex surfaces. In this way, the contact area at the connection between the second hot end and the second side wall 12 is increased, the heat dissipation area is increased, and the heat dissipation efficiency and heat dissipation effect are improved. At the same time, through the configuration of the convex surface and the concave surface, the connection tightness between the second thermoelectric effect element 400 and the first side wall 11 can be enhanced, thereby improving the stability of the entire battery module 30.
[0055] Of course, in other embodiments, the sixth abutment surface 402 can also be a concave surface or multiple concave surfaces. In this case, the abutment surface of the second side wall 12 is a concave surface that matches the convex surface, or a multiple convex surface that matches the multiple concave surfaces. The specific shapes of the sixth abutment surface 402 and the abutment surface of the second side wall 12 are not limited here, as long as the two can be tightly abutted against each other.
[0056] In one possible embodiment, the first heat-conducting member 210 includes a first heat-conducting plate 211 and a plurality of first heat-conducting columns 212, the plurality of first heat-conducting columns 212 are arranged at intervals on the same side of the first heat-conducting plate 211, the first heat-conducting column 212 is plugged into the battery cell assembly 100, the first heat-conducting plate 211 is connected to the battery cell assembly 100 through the plurality of first heat-conducting columns 212, and is pressed against the first heat dissipation surface 101; and / or, the second heat-conducting member 220 includes a second heat-conducting plate 221 and a plurality of second heat-conducting columns 222, the plurality of second heat-conducting columns 222 are arranged at intervals on the same side of the second heat-conducting plate 221, the second heat-conducting column 222 is plugged into the battery cell assembly 100, the second heat-conducting plate 221 is connected to the battery cell assembly 100 through the plurality of second heat-conducting columns 222, and is pressed against the second heat dissipation surface 102.
[0057] In this embodiment, the specific configuration of the first heat conducting member 210 / the second heat conducting member 220 is optimized. Specifically, the first heat conducting member 210 is configured as a composite member including at least a first heat conducting plate 211 and a plurality of first heat conducting pillars 212. The first heat conducting plate 211 may be a copper metal plate with a plurality of connection holes provided thereon; the first heat conducting pillar 212 may be a copper metal pillar, one end of which may be connected to the connection hole of the first heat conducting plate 211 by welding or the like, and the other end may be plugged into the battery cell assembly 100 through the connection hole provided on the battery cell assembly 100, so that the heat generated inside the battery cell assembly 100 is transferred to the outside, the temperature inside the battery cell assembly 100 is reduced, and the temperature uniformity of the battery cell assembly 100 is improved.
[0058] The second heat-conducting member 220 is configured as a composite component including at least a second heat-conducting plate 221 and a plurality of second heat-conducting columns 222. The second heat-conducting plate 221 may be a copper metal plate with a plurality of connecting holes provided thereon. The second heat-conducting column 222 may be a copper metal column, one end of which may be connected to the connecting hole of the second heat-conducting plate 221 by welding or the like, and the other end of which may be plugged into the battery cell assembly 100 through a connecting hole provided on the battery cell assembly 100. In this way, the heat generated inside the battery cell assembly 100 is transferred to the outside, thereby cooling the inside of the battery cell assembly 100 and improving the temperature uniformity of the battery cell assembly 100.
[0059] In a possible implementation, the thermal conductive assembly 200 further includes a first silicone pad 230 and a second silicone pad 240 . The first silicone pad 230 is disposed between the first heat dissipation surface 101 and the first thermal conductive member 210 , and the second silicone pad 240 is disposed between the second heat dissipation surface 102 and the second thermal conductive member 220 .
[0060] In this embodiment, the specific configuration of the heat-conducting component 200 is further optimized. Specifically, the heat-conducting component 200 is configured as a composite component including at least a first heat-conducting member 210, a second heat-conducting member 220, a first silicone pad 230 and a second silicone pad 240. The first silicone pad 230 is configured between the first heat-conducting member 210 and the first heat-dissipating surface 101, which can be used to form a buffer structure between the first heat-conducting member 210 and the first heat-dissipating surface 101 of the battery cell assembly 100 to prevent mechanical damage to the battery cell assembly 100 caused by external impact force / impact force and improve the impact resistance of the battery cell assembly 100; and can also increase the heat-dissipating space between the first heat-conducting member 210 and the first heat-dissipating surface 101, further improve the heat-dissipating effect and enhance the heat-dissipating performance. The second silicone pad 240 is disposed between the second heat-conducting member 220 and the second heat-dissipating surface 102. It can be used to form a buffer structure between the second heat-conducting member 220 and the second heat-dissipating surface 102 of the battery cell assembly 100 to prevent mechanical damage to the battery cell assembly 100 caused by external impact force / impact force and improve the impact resistance of the battery cell assembly 100; it can also increase the heat dissipation space between the second heat-conducting member 220 and the second heat-dissipating surface 102 to further improve the heat dissipation effect and enhance the heat dissipation performance.
[0061] In addition, see Figures 1 to 4 , the present application also provides a battery pack, comprising:
[0062] The box body 10 has a first side wall 11 and a second side wall 12 which are arranged opposite to each other;
[0063] The box cover 20 covers the box body 10 and forms a closed containing cavity together with the box body 10; and
[0064] As described above, the battery module 30 is disposed in a sealed accommodating chamber, the first hot end of the first thermoelectric effect element 300 of the battery module 30 abuts against the first side wall 11 , and the second hot end of the second thermoelectric effect element 400 of the battery module 30 abuts against the second side wall 12 .
[0065] In this embodiment, a first thermoelectric effect element 300 and a second thermoelectric effect element 400 are added to the outside of the heat conductive component 200 of the battery module 30. By introducing current into the first thermoelectric effect element 300 and the second thermoelectric effect element 400, the heat generated at the battery cell assembly 100 is transferred from the inside of the battery cell assembly 100 to its outer edge, so as to achieve uniform heat dissipation of the battery module 30, improve the temperature uniformity, charging and discharging performance and heat dissipation effect of the battery module 30; at the same time, through the integrated heat dissipation method combining the heat conductive component 200 with the first thermoelectric effect element 300 and the second thermoelectric effect element 400, the heat dissipation efficiency of the battery cell assembly 100 is further improved, so that the battery module 30 can be applied to the heat dissipation requirements of high-power load operations, and the application range of the battery module 30 is improved. In addition, compared with the traditional liquid cooling heat dissipation method, the heat transfer operation of the first thermoelectric effect element 300 and the second thermoelectric effect element 400 is not limited by the ambient temperature. The environmental adaptability range of the battery module 30 provided in the embodiment of the present application is larger and the application scenarios are more.
[0066] Specifically, the battery pack is configured as a combined component including at least a box body 10, a box cover 20 and a battery module 30. The box body 10 may be a square box body 10, which is provided with an opening, through which the battery module 30 can be assembled in the box body 10; the box cover 20 may be a directional cover plate, which is used to cover the opening on the box body 10 to provide a closed and safe working space for the battery module 30; the first thermoelectric effect element 300 and the second thermoelectric effect element 400 of the battery module 30 are respectively abutted against the first side wall 11 and the second side wall 12 of the box body 10. At this time, the heat transfer path generated by the battery cell assembly 100 includes at least two paths: one is the battery cell assembly 100 → the first heat conductive element 210 → the first thermoelectric effect element 300 → the first side wall 11 → the surrounding environment; the other is the battery cell assembly 100 → the second heat conductive element 220 → the second thermoelectric effect element 400 → the second side wall 12 → the surrounding environment.
[0067] In one example, the battery pack may also be a cylindrical battery or a soft-pack battery, etc., and the usage scenario of the battery pack is not limited here.
[0068] It should be understood that the specific structure of the battery module 30 refers to the above-mentioned embodiments. Since the battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.
[0069] In a possible embodiment, the first side wall 11 is any one of a plane, a serrated surface, a concave surface or a convex surface. Such a configuration can increase the heat dissipation area of the first side wall 11, improve the heat dissipation efficiency and the heat dissipation effect. Specifically, the first side wall 11 can be a plane to facilitate processing and reduce production costs. Alternatively, the first side wall 11 can be a serrated surface, a concave surface or a convex surface to increase the contact area between the first side wall 11 and the surrounding environment, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect.
[0070] In a possible embodiment, the second side wall 12 is any one of a plane, a serrated surface, a concave surface or a convex surface. Such a configuration can increase the heat dissipation area of the second side wall 12, improve the heat dissipation efficiency and the heat dissipation effect. Specifically, the second side wall 12 can be a plane to facilitate processing and reduce production costs. Alternatively, the second side wall 12 can be a serrated surface, a concave surface or a convex surface to increase the contact area between the second side wall 12 and the surrounding environment, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect.
[0071] In one possible implementation, the battery pack is formed by a potting process. This arrangement can not only enhance the heat transfer and heat conductivity between the components inside the battery pack, facilitating heat dissipation, but also enhance the integrity of the components inside the battery pack and improve resistance to external impacts, vibrations, etc. At the same time, it can also improve the insulation between the internal components and the circuits, which is conducive to the miniaturization and lightweight layout of the battery pack. In addition, the potting process can also prevent the internal components, circuits, etc. from being directly exposed to the environment, which can effectively improve the waterproof, dustproof, moisture-proof and other properties of the battery pack.
[0072] In a possible embodiment, a plurality of battery modules 30 are provided, and the plurality of battery modules 30 are overlapped and arranged in a closed accommodating cavity along the length direction Y of the box body 10. With such an arrangement, the operating power of the battery pack can be increased by configuring a plurality of battery modules 30, so that the battery pack can meet the requirements of high-power load carrying and improve the environmental adaptability range of the battery pack. For example, three battery modules 30 can be provided, and the three battery modules 30 are overlapped and arranged in the length direction Y of the box body 10. The first thermoelectric effect element 300 of each battery module 30 is in contact with the first side wall 11 of the box body 10, and the second thermoelectric effect element 400 of each battery module 30 is in contact with the second side wall 12 of the box body 10. In this way, simultaneous heat dissipation of multiple battery modules 30 can be achieved, thereby improving the heat dissipation efficiency and heat dissipation effect of the battery modules 30.
[0073] In a possible implementation manner, a third thermoelectric effect element 40 is further included. The third thermoelectric effect element 40 is disposed on two opposite sides of the battery module 30 along the length direction Y of the box body 10 .
[0074] In this embodiment, the specific configuration of the battery pack is further optimized. Specifically, the battery pack is configured as a composite component including at least a box body 10, a box cover 20, a battery module 30 and a third thermoelectric effect element 40. The third thermoelectric effect element 40 can be a semiconductor thermoelectric material sheet component made of bismuth telluride, and multiple third thermoelectric effect elements 40 can be provided. At least two third thermoelectric effect elements 40 are correspondingly provided for one battery module 30, and the two third thermoelectric effect elements 40 are arranged at intervals along the length direction Y of the box body 10. In this way, the heat dissipation of the upper and lower sides of the battery module 30 can be achieved through the third thermoelectric effect element 40, further improving the heat dissipation efficiency and heat dissipation effect.
[0075] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0076] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0077] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.
Claims
1. A battery module, characterized in that: include: The battery cell assembly has a first heat dissipation surface and a second heat dissipation surface arranged opposite to each other; A heat-conducting assembly, comprising a first heat-conducting member disposed on the first heat-dissipating surface and a second heat-conducting member disposed on the second heat-dissipating surface; A first thermoelectric effect element is disposed on a side of the first heat conductive element away from the first heat dissipation surface, wherein a first cold end of the first thermoelectric effect element is connected to the first heat conductive element, and a first hot end of the first thermoelectric effect element is used to connect to a first side wall of the box of the battery pack; as well as The second thermoelectric effect element is arranged on a side of the second heat conducting element away from the second heat dissipation surface. The second cold end of the second thermoelectric effect element is connected to the second heat conducting element. The second hot end of the second thermoelectric effect element is used to connect to the second side wall of the box.
2. The battery module according to claim 1, characterized in that: The first thermoelectric effect element includes a first ceramic, a first temperature difference thermocouple pair, a first conductor and a second ceramic, the first temperature difference thermocouple pair is respectively connected to the first ceramic and the second ceramic through the first conductor, the first cold end is the first ceramic, and the first hot end is the second ceramic; and / or, The second thermoelectric effect element includes a third ceramic, a second temperature difference thermocouple pair, a second conductor and a fourth ceramic. The second temperature difference thermocouple pair is respectively connected to the third ceramic and the fourth ceramic through the second conductor. The second cold end is the third ceramic, and the second hot end is the fourth ceramic.
3. The battery module according to claim 2, characterized in that: The first heat conducting member includes a first abutting surface, the first abutting surface is located on a side of the first heat conducting member away from the first heat dissipation surface, the first cold end includes a second abutting surface abutting against the first abutting surface, the first abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex surface or a multi-groove surface; and / or, The second heat-conducting member includes a third abutting surface, which is located on a side of the second heat-conducting member away from the second heat dissipation surface. The second cold end includes a fourth abutting surface abutting against the third abutting surface. The third abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex hull surface or a multi-groove surface.
4. The battery module according to claim 3, characterized in that: The first hot end comprises a fifth abutting surface abutting against the first side wall, wherein the fifth abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex surface or a multi-concave surface; and / or, The sixth abutting surface where the second hot end abuts against the second side wall is any one of a flat surface, a convex surface, a concave surface, a multi-convex surface or a multi-concave surface.
5. The battery module according to claim 1, characterized in that: The first heat-conducting member includes a first heat-conducting plate and a plurality of first heat-conducting columns, the plurality of first heat-conducting columns are arranged at intervals on the same side of the first heat-conducting plate, the first heat-conducting columns are plugged into the battery core assembly, the first heat-conducting plate is connected to the battery core assembly through the plurality of first heat-conducting columns, and is pressed against the first heat dissipation surface; and / or, The second heat-conducting member includes a second heat-conducting plate and a plurality of second heat-conducting columns, wherein the plurality of second heat-conducting columns are arranged at intervals on the same side of the second heat-conducting plate, the second heat-conducting columns are plugged into the battery cell assembly, and the second heat-conducting plate is connected to the battery cell assembly through the plurality of second heat-conducting columns and pressed against the second heat dissipation surface.
6. The battery module according to claim 1, characterized in that: The heat-conducting assembly further includes a first silicone pad and a second silicone pad, wherein the first silicone pad is disposed between the first heat dissipation surface and the first heat-conducting member, and the second silicone pad is disposed between the second heat dissipation surface and the second heat-conducting member.
7. A battery pack, characterized in that: include: The box body has a first side wall and a second side wall which are arranged opposite to each other; A box cover, covering the box body and enclosing the box body to form a closed accommodating cavity; as well as The battery module according to any one of claims 1 to 6, wherein the battery module is arranged in the closed accommodation cavity, the first hot end of the first thermoelectric effect element of the battery module abuts the first side wall, and the second hot end of the second thermoelectric effect element of the battery module abuts the second side wall.
8. The battery pack according to claim 7, characterized in that: The first side wall is any one of a flat surface, a serrated surface, a concave surface or a convex surface; and / or, The second side wall is any one of a flat surface, a serrated surface, a concave surface or a convex surface.
9. The battery pack according to claim 7, characterized in that: The battery pack is formed by a potting process.
10. The battery pack according to claim 7, characterized in that: There are a plurality of battery modules, and the plurality of battery modules are overlapped and arranged in the sealed accommodating cavity along the length direction of the box body.
11. The battery pack according to claim 10, characterized in that: It also includes a third thermoelectric effect element, which is arranged on opposite sides of the battery module along the length direction of the box.