CN212783686U - Metal conductive frame of battery core - Google Patents
Metal conductive frame of battery core Download PDFInfo
- Publication number
- CN212783686U CN212783686U CN202021857960.7U CN202021857960U CN212783686U CN 212783686 U CN212783686 U CN 212783686U CN 202021857960 U CN202021857960 U CN 202021857960U CN 212783686 U CN212783686 U CN 212783686U
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- Prior art keywords
- conductive
- conductive part
- metal
- frame
- solder
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- 239000002184 metal Substances 0.000 title claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 47
- 229910000679 solder Inorganic materials 0.000 claims abstract description 34
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 3
- 239000002360 explosive Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005476 soldering Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a metal conducting frame, be used for connecting a plurality of battery cores and become a group battery, metal conducting frame includes a first conductive part and a plurality of second conductive part, a surface of second conductive part sees through a solder and connects first conductive part, another surface of second conductive part is formed with an at least convex part, the second conductive part sees through the positive pole or the negative pole that the convex part connects the battery core, the melting point of solder is less than the melting point of first conductive part and the melting point of second conductive part, when one of them battery core thermal runaway, the solder between first conductive part and second conductive part will melt, the explosive gas that produces during the thermal runaway will blow away molten solder, with destroyed the joint structure between first conductive part and the second conductive part, and then the high heat of avoiding the thermal runaway production sees through metal conducting frame heat-conduction between each battery core.
Description
Technical Field
The present invention relates to a metal frame, and more particularly to a metal frame for connecting battery cells together.
Background
The battery cells have the function of storing electric energy, and a plurality of battery cells are connected in series or in parallel to form a battery pack which can be used as a power supply source of mechanical equipment, such as an electric vehicle. When in use, a plurality of battery cells are connected in series/parallel through the metal conductive frame to form a battery pack, so that the battery pack can output the voltage required by the machine equipment and provide enough stored energy for the machine equipment.
In the past, a single metal conductive frame with a relatively high thickness was generally used as a connection structure between battery cells to provide a robust battery pack that is protected from structural damage when the battery pack is impacted by external forces. However, when thermal runaway occurs in one of the battery cells, the generated high heat will be conducted to each battery cell through the metal conductive frame with a higher thickness, so that other battery cells will suffer from thermal runaway delay due to the influence of the high heat, and further, a cyclic explosion will occur. Therefore, the design of the conventional metal conductive frame has a high risk in using the battery pack.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a metal conductive frame, which is applied to the connection of battery cells and includes a first conductive part and a plurality of second conductive parts; the first conductive part and the second conductive part are connected together by soft soldering with a solder; when one battery core is in thermal runaway, the solder between the first conductive part and the second conductive part is melted, the second conductive part begins to be separated from the first conductive part, and explosion gas generated during the thermal runaway can blow away the melted solder, so that the joint structure between the first conductive part and the second conductive part is damaged.
In order to achieve the above object, the utility model provides a metal of battery core electrically conducts frame, include: a first conductive portion; a plurality of second conductive parts including a first surface and a second surface, wherein the first surface of the second conductive part is connected with the first conductive part through at least one solder, the first conductive part and the second conductive part are respectively made of different metal materials, and the melting points of the solder are respectively lower than the melting point of the first conductive part and the melting point of the second conductive part; and at least one first convex part formed on the second surface of the second conductive part and used for connecting a battery cell.
In an embodiment of the present invention, the solder is a solder.
In an embodiment of the present invention, the first conductive portion includes a connecting surface contacting the second conductive portion, at least one first concave portion is formed on the connecting surface of the first conductive portion, and the solder is disposed in the first concave portion and used for connecting the first conductive portion and the second conductive portion together.
In an embodiment of the present invention, at least one second concave portion is formed on the first surface of the second conductive portion, the number of the second concave portions is equal to the number of the first convex portions, and the position of the second concave portion corresponds to the position of the first convex portion.
In an embodiment of the present invention, the first convex portion and the second concave portion are formed on the second conductive portion by a press forming method.
In one embodiment of the present invention, the first convex portion of the second conductive portion is connected to a case of the battery cell by a resistance welding method.
In an embodiment of the present invention, the resistivity of the second conductive portion is greater than the resistivity of the first conductive portion.
In an embodiment of the present invention, the metal conductive frame is connected to the corresponding battery core by one or more second conductive parts.
In an embodiment of the present invention, the plurality of second conductive portions are connected together through a connecting portion.
In an embodiment of the present invention, the thickness or the sectional area of the second conductive portion is smaller than the thickness or the sectional area of the first conductive portion.
Drawings
FIG. 1: do the utility model discloses the structure plan view of an embodiment of the metal conducting rack.
FIG. 2: the structure of an embodiment of the metal conductive frame of the present invention is exploded.
FIG. 3: is the structure side view combination diagram of the embodiment of the metal conductive frame of the utility model.
FIG. 4: do the utility model discloses the structure plan view of an embodiment of battery core is connected to the electrically conductive frame of metal.
FIG. 5: do the utility model discloses the structure side view of battery core embodiment is connected to the electrically conductive frame of metal.
Description of reference numerals: 10-a metal conductive frame; 11-a first conductive portion; 110-circular hole; 111-attachment face; 112-a first recess; 13-a second conductive portion; 131-a first surface; 132-a second surface; 133-a first projection; 134-a second recess; 15-solder; 151-a bonding layer; 17-a connecting portion; 30-a battery cell; 31-a housing; 311-gap.
Detailed Description
Please refer to fig. 1, fig. 2 and fig. 3, which are a top view, a side exploded view and a side combined view of the metal conductive frame according to an embodiment of the present invention. As shown in fig. 1, 2 and 3, the metal frame 10 of the present invention is applied to the connection of each battery cell, and includes a first conductive portion 11 and a plurality of second conductive portions 13. And the second conductive parts 13 are connected together through a connection part 17.
The second conductive portion 13 includes a first surface 131 and a second surface 132. The first surface 131 and the second surface 132 are corresponding surfaces on the second conductive portion 13. Wherein a portion of the first surface 131 of the second conductive portion 13 is connected to the first conductive portion 11 through at least one solder 15 to form a main body structure of the metal conductive frame 10. In an embodiment of the present invention, the solder 15 is a low melting point solder material, such as solder, and the melting point of the solder 15 is far lower than the melting point of the first conductive part 11 and the melting point of the second conductive part 13.
The metal frame 10 of the present invention is connected to the first conductive portion 11 and the second conductive portion 13 by soldering (soldering). In the soldering bonding step, first, the first conductive part 11 is placed in a fixed position in an inverted state. One or more solders 15 are placed on a part of the surface of the first conductive part 11. Then, the first surface 131 of the second conductive part 13 is pressed against the first conductive part 11, and an external force is applied between the first conductive part 11 and the second conductive part 13 to deform the solder 15 between the first conductive part 11 and the second conductive part 13. Then, a Reflow Oven (Reflow Oven) or other heating tool (such as an infrared heating lamp or a heat gun) is used to heat the first conductive part 11 and the second conductive part 13 through a Reflow soldering method, so that the solder 15 between the first conductive part 11 and the second conductive part 13 can be melted and wet-spread on the surfaces of the first conductive part 11 and the second conductive part 13 to form a bonding layer 151.
Further, the first conductive portion 11 includes a connecting surface 111 contacting the second conductive portion 13. At least one first recess 112 is formed on the connection surface 111 of the first conductive portion 11. Before the soldering step is performed, the solder 15 can be firmly placed in the first concave portion 112, so that the solder 15 in the first concave portion 112 will not run to other positions when the first conductive portion 11 and the second conductive portion 13 are pressed by external force. Further, when the solder 15 is heated to be melted, the liquefied solder 15 will be dipped into the first concave portion 112, so that the first concave portion 112 becomes a soldering point of the solder 15. Subsequently, the first concave portion 112 will have a clamping effect on the bonding layer 151 formed by the cooled solder 15, so as to improve the bonding force between the first conductive portion 11 and the second conductive portion 13.
In addition, the second surface 132 of the second conductive portion 13 is formed with at least one first protrusion 133. The first protrusion 133 is a bump protruding from the second surface 132 of the second conductive portion 13. In an embodiment of the present invention, the first convex portion 133 is formed on the second surface 132 of the second conductive portion 13 by a press forming method, and the second concave portion 134 corresponding to the number of the first convex portion 133 is formed on the first surface 131 of the second conductive portion 13. Wherein, the position of the first protrusion 133 corresponds to the position of the second recess 134. Alternatively, in another embodiment of the present invention, the second conductive portion 13 is manufactured by casting, so that the second concave portion 134 is not formed on the first surface 131 of the second conductive portion 13.
In the embodiment of the present invention, the second conductive portion 13 and the first conductive portion 11 are partially overlapped, wherein the first protrusion 133 and/or the second recess 134 of the second conductive portion 13 do not overlap with the first conductive portion 11. Specifically, the first protrusion 133 and/or the second recess 134 may be disposed on the second conductive portion 13 in a region not overlapping with the first conductive portion 11, so that the bonding layer 151 connecting the first conductive portion 11 and the second conductive portion 13 does not contact the second recess 134 of the second conductive portion 13.
In an embodiment of the present invention, a plurality of circular holes 110 are formed on the metal plate of the first conductive portion 11. Alternatively, in another embodiment of the present invention, the first conductive portion 11 is a metal plate without a hole.
Please refer to fig. 4 and fig. 5, which are a top view and a side view of the metal conductive frame connecting to the battery core according to an embodiment of the present invention. As shown in fig. 4 and 5, after the first conductive part 11 and the second conductive part 13 of the metal conductive frame 10 are combined into the metal conductive frame 10, the metal conductive frame 10 is turned over, for example, the first conductive part 11 is located above the second conductive part 13, and the second conductive part 13 is connected to the case 31 of the battery cell 30 via the first protrusion 133, for example, connected to the positive electrode or the negative electrode of the battery cell 30. Specifically, the first convex portion 133 of the second conductive portion 13 is connected to the case 31 of the battery cell 30 by welding (welding).
In an embodiment of the present invention, the first protrusion 133 of the second conductive part 13 can be connected to the case 31 of the battery cell 30 by resistance welding (resistance welding). First, the first protrusion 133 of the second conductive part 13 is contacted with the case 31 of the battery cell 30, for example, the case 31 of the metal material of the positive electrode or the negative electrode of the battery cell 30. Then, current is supplied to second conductive portion 13 and case 31 of battery cell 30, and since second conductive portion 13 and case 31 of battery cell 30 are both made of metal and have resistance, when current passes through second conductive portion 13 and case 31 of battery cell 30, the temperature of second conductive portion 13 and case 31 of battery cell 30 in contact therewith will rise. When the temperature of the second conductive part 13 and the case 31 of the battery cell 30 reaches a specific value, the first protrusion 133 of the second conductive part 13 and the surface area of the case 31 in contact therewith will generate a resistance heating effect, so that the first protrusion 133 and the surface area of the case 31 in contact therewith are welded and combined together, and after the temperature of the second conductive part 13 and the case 31 of the battery cell 30 drops, the connection between the second conductive part 13 and the battery cell 30 is completed. Furthermore, after the first protrusion 133 of the second conductive portion 13 is combined with the housing 31 of the battery cell 30, there is a gap 311 between the second conductive portion 13 and the housing 31. Herein, each second conductive part 13 of the metal conductive frame 10 is connected to a corresponding battery cell 30, so as to connect the battery cells 30 in series/parallel to form a battery pack.
The first conductive portion 11 and the second conductive portion 13 are made of different materials, for example, the first conductive portion 11 may be copper, and the second conductive portion 13 may be nickel. The resistivity of the second conductive portion 13 is greater than the resistivity of the first conductive portion 11, i.e., the conductivity of the first conductive portion 11 is higher than the conductivity of the second conductive portion 13. Since the second conductive part 13 has a larger resistivity, when the second conductive part 13 of the battery holder 10 and the case 31 of the battery cell 30 in contact are connected by resistance welding, the supply of current to the second conductive part 13 can be reduced, so as to reduce the energy consumed when the metal holder 10 is connected to the battery cell 30.
In addition, the thickness or cross-sectional area of the second conductive portion 13 is smaller than the thickness of the first conductive portion 11. When the second conductive part 13 and the case 31 of the battery cell 30 are connected by resistance welding, the second conductive part 13 having a smaller thickness or cross-sectional area can reduce the pressing of the first protrusion 133 against the case 31 of the battery cell 30, thereby preventing the damage of the structure of the battery cell 30 during the welding between the metal conductive frame 10 and the battery cell 30.
Furthermore, as shown in fig. 4, the metal frame 10 connects a single battery cell 30 with two second conductive parts 13, however, in actual manufacturing, the metal frame 10 can also connect a single battery cell 30 with a single second conductive part 13 or more than two second conductive parts 13.
In view of the above, the metal frame 10 of the present invention is connected to the first conductive portion 11 and the second conductive portion 13 by soldering (soldering). When thermal runaway (thermal runaway) occurs in one of the battery cells 30, the bonding layer 151 formed by the solder 15 between the first conductive part 11 and the second conductive part 13 will melt, the second conductive part 13 will begin to separate from the first conductive part 11, and the molten solder 15 will be blown away by the explosive gas generated during the thermal runaway, so as to break the bonding structure between the first conductive part 11 and the second conductive part 13, thereby preventing high heat generated by the thermal runaway from being conducted between the battery cells 30 through the metal conductive frame 10, and reducing the chance of battery pack burning.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is intended to cover all equivalent changes and modifications of the shapes, structures, features and spirit of the claims.
Claims (10)
1. A metal conducting frame of a battery core is characterized by comprising:
a first conductive portion;
a plurality of second conductive parts including a first surface and a second surface, wherein the first surface of the second conductive part is connected with the first conductive part through at least one solder, the first conductive part and the second conductive part are respectively made of different metal materials, and the melting points of the solder are respectively lower than the melting point of the first conductive part and the melting point of the second conductive part; and
at least one first convex part is formed on the second surface of the second conductive part and used for connecting a battery cell.
2. The metal conducting frame as defined in claim 1, wherein the solder is a solder.
3. The metal conductive frame as in claim 1, wherein said first conductive portion includes a connecting surface in contact with said second conductive portion, at least a first recess formed in said connecting surface of said first conductive portion, said solder being disposed in said first recess and adapted to join said first conductive portion and said second conductive portion together.
4. The metal frame of claim 1, wherein the first surface of the second conductive portion has at least one second concave portion formed thereon, the number of the second concave portions is equal to the number of the first convex portions, and the position of the second concave portion corresponds to the position of the first convex portion.
5. The metal conductive frame as claimed in claim 4, wherein the first convex portion and the second concave portion are formed on the second conductive portion by a press-forming method.
6. The metal frame of claim 1, wherein the first projection of the second conductive portion is attached to a housing of the battery cell by a resistance welding process.
7. The metallic conductive frame of claim 1, wherein the resistivity of the second conductive portion is greater than the resistivity of the first conductive portion.
8. The metal conductive frame as claimed in claim 1, wherein the metal conductive frame connects the corresponding battery cells with one or more second conductive portions.
9. The metal conductive frame as in claim 1, wherein the plurality of second conductive portions are connected together by a connecting portion.
10. The metallic conductive frame of claim 1, wherein a thickness or cross-sectional area of the second conductive portion is less than a thickness or cross-sectional area of the first conductive portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021857960.7U CN212783686U (en) | 2020-08-31 | 2020-08-31 | Metal conductive frame of battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021857960.7U CN212783686U (en) | 2020-08-31 | 2020-08-31 | Metal conductive frame of battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212783686U true CN212783686U (en) | 2021-03-23 |
Family
ID=75055905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021857960.7U Active CN212783686U (en) | 2020-08-31 | 2020-08-31 | Metal conductive frame of battery core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212783686U (en) |
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2020
- 2020-08-31 CN CN202021857960.7U patent/CN212783686U/en active Active
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