CN211125702U - Power battery's safe apron subassembly and have its power battery - Google Patents
Power battery's safe apron subassembly and have its power battery Download PDFInfo
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- CN211125702U CN211125702U CN201922084510.2U CN201922084510U CN211125702U CN 211125702 U CN211125702 U CN 211125702U CN 201922084510 U CN201922084510 U CN 201922084510U CN 211125702 U CN211125702 U CN 211125702U
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- power battery
- cover plate
- safety cover
- connecting piece
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- 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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Abstract
The utility model discloses a power battery's safe cover plate subassembly and have its power battery, power battery's safe cover plate subassembly includes: the electric connector comprises a substrate, a first connecting sheet and a second insulating piece, wherein one end of the substrate is provided with a first pole column unit, the other end of the substrate is provided with a second pole column unit, a conductive piece is arranged between the first pole column unit and the substrate, and a first insulating piece is arranged between the second pole column unit and the substrate; the first connecting sheet is connected to the first pole unit and is positioned on one side of the substrate, which faces away from the first insulating part; the second insulating member is disposed between the first connection piece and the base plate to separate the first connection piece and the base plate. According to the utility model discloses a power battery's safe cover plate subassembly takes place to melt through can melting the insulating part and starts positive negative pole short circuit, realizes the initiative release battery energy, and then prevents the heat of battery and stretch, reaches the purpose of protection battery.
Description
Technical Field
The utility model belongs to the technical field of the battery technique and specifically relates to a power battery's safe cover plate subassembly and have its power battery is related to.
Background
In the related art, aiming at the ignition and explosion of the single battery, the following two schemes are mainly adopted, wherein one scheme is that an explosion-proof valve is arranged on the battery, and the battery is protected by releasing the internal pressure of the battery; in addition, an OSD (over charge Safety Device) is arranged in the battery, when the air pressure in the battery reaches a certain pressure value (the air pressure is smaller than the pressure value of the opening of the explosion-proof valve) during an Overcharge test, the OSD reversing sheet starts to reverse and contact with the negative pole post, the positive pole and the negative pole generate a large short-circuit current, FUSE (FUSE wire) on the connecting sheet at the positive pole lug is fused, an external charging circuit is cut off, and the battery is protected.
The first mode of adopting the explosion-proof valve can only release the internal pressure of the battery, cannot solve the combustion problem of the battery, and cannot solve the heat spread in the battery pack; the second mode adopts OSD starting inversion, is only effective to overcharge test in practical application, does not play any role in combustion and explosion caused by short circuit and heat spread in the battery, and has complex OSD structure and higher cost. Therefore, there is room for improvement in the above-described technology.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a power battery's safe apron subassembly, power battery's safe apron subassembly takes place to melt through can melting the insulating part and starts positive negative pole short circuit, realizes the initiative release power battery energy, and then hinders power battery's heat and stretch, reaches the purpose of protection power battery.
The utility model also provides a power battery of the safe cover plate subassembly that has above-mentioned power battery.
According to the utility model discloses a power battery's safe cover plate subassembly, include: the electric connector comprises a substrate, a first connecting sheet and a second insulating piece, wherein one end of the substrate is provided with a first pole column unit, the other end of the substrate is provided with a second pole column unit, a conductive piece is arranged between the first pole column unit and the substrate, and a first insulating piece is arranged between the second pole column unit and the substrate; the first connecting piece is connected to the second pole column unit and is positioned on one side, opposite to the first insulating piece, of the substrate; the second insulating member is provided between the first connecting piece and the base plate to separate the first connecting piece and the base plate, at least a portion of the second insulating member is formed as a fusible insulating portion, the first connecting piece and the fusible insulating portion are in contact with each other, and the fusible insulating portion is fused to short-circuit the first connecting piece and the base plate when the temperature of the battery reaches a safety limit temperature.
According to the utility model discloses a power battery's safe cover plate subassembly takes place to melt through can melting the insulating part and starts positive negative pole short circuit, realizes the initiative release power battery energy, and then hinders power battery's heat and stretch, reaches protection power battery's purpose.
According to the utility model discloses a power battery's safe cover plate subassembly, the second insulator with first connecting piece joint links to each other.
According to the utility model discloses a power battery's safe cover plate subassembly of embodiment, first connecting piece includes:
the fixing part is fixedly connected with the second pole column unit;
one end of the extending portion is connected with the fixing portion, the other end of the extending portion extends towards the first pole column unit, and the end portion of the extending portion bends downwards and is suitable for being in abutting contact with the meltable insulating portion.
According to the utility model discloses a power battery's safe cover plate subassembly of embodiment, the extension includes:
a body portion provided with a groove opened toward one side of the first pole unit;
two extension limbs are established the both sides of recess and respectively to keeping away from one side of this part of body extends, every the tip of extension limb all with can melt insulating part end contact.
According to the utility model discloses a power battery's safe cover plate subassembly, the tip orientation of extension limb one side of base plate is equipped with the butt face, the butt face be suitable for can melt the insulating part melt the back with the base plate contact is with release current.
According to the utility model discloses a power battery's safe cover plate subassembly be equipped with a plurality of buckles on the second insulating part, it is a plurality of the buckle is located every respectively extend the both sides of limb and can block the correspondence extend limb.
According to the utility model discloses power battery's safe cover plate subassembly still includes: and the second connecting sheet is connected to the second pole column unit, is positioned on one side of the substrate back to the conductive piece, and is positioned on the same side of the substrate.
According to the utility model discloses a power battery's safe cover plate subassembly, first connection piece with the second connection piece is in bilateral symmetry arranges on the base plate.
According to the utility model discloses a power battery's safe apron subassembly, can melt the insulating part and form into polycaprolactone layer or rubber and plastic foaming layer.
According to the utility model discloses a power battery of second aspect is provided with as any kind of first aspect power battery's safe apron subassembly, still includes: the battery pack comprises a box body and a plurality of battery module units, wherein an accommodating cavity is defined in the box body; the battery module units are arranged in the accommodating cavity, and each battery module unit is provided with a positive pole column and a negative pole column; the safety cover plate assembly comprises a plurality of safety cover plate assemblies, wherein each safety cover plate assembly comprises a first pole unit and two adjacent negative pole units, one negative pole unit is connected with one of the battery module units, and each safety cover plate assembly comprises a second pole unit and two adjacent positive pole units, and the other positive pole unit is connected with the other one of the battery module units. Compared with the prior art, the power battery has the same advantages as the safety cover plate component of the power battery, so that the safety performance is high.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front view of a safety cover plate assembly for a power battery according to an embodiment of the present invention;
fig. 2 is a bottom view of a safety cover plate assembly of a power battery according to an embodiment of the present invention;
FIG. 3 is an enlarged partial view of the section A in FIG. 2;
fig. 4 is a side view of a safety cover plate assembly for a power cell according to an embodiment of the present invention;
fig. 5 is a top view of a safety cover plate assembly of a power battery according to an embodiment of the present invention.
Reference numerals:
100-safety cover plate component, 1-base plate, 11-first pole unit, 12-second pole unit, 2-conductive piece, 3-first insulating piece, 4-first connecting piece, 41-fixing part, 42-extending part, 421-body part, 422-extending limb part, 5-second insulating piece, 51-meltable insulating part, 52-buckle, 6-groove, 7-abutting surface and 8-second connecting piece.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
A safety cover plate assembly 100 for a power battery according to an embodiment of the present invention is described below with reference to fig. 1 to 5. As shown in fig. 1 and 2, a safety cover plate assembly 100 of a power battery according to an embodiment of the present invention includes: the battery comprises a substrate 1, a first connecting sheet 4 and a second insulating member 5, wherein one end of the substrate 1 is provided with a first pole unit 11, and the first pole unit 11 can be a positive pole unit; similarly, the other end of the substrate 1 is provided with a second pole unit 12, and the first pole unit 12 may be a negative pole unit. Further, a conductive member 2 is disposed between the first pole unit 11 and the substrate 1, the conductive member 2 may be a metal conductive member or a non-metal conductive member, and the conductive member 2 may set a corresponding resistance value according to a current target value of an energy release speed controlled by the power battery, specifically, the current target value is smaller than a FUSE (FUSE) fusing current value, so as to ensure that a protection action of the safety cover plate assembly 100 is prior to FUSE protection, thereby improving the safety performance of the power battery.
Further, a first insulating member 3 is provided between the second pole unit 12 and the substrate 1, and the first insulating member 3 can protect the second pole unit 12 from the substrate 1. Further, the first connection tab 4 is connected to the second pole cell 12, and the first connection tab 4 is located on a side of the substrate 1 facing away from the first insulating member 3. Further, a second insulating member 5 is provided between the first connection piece 4 and the base plate 1 to separate the first connection piece 4 and the base plate 1, and insulation protection between the first connection piece 4 and the base plate 1 can be achieved by the second insulating member 5.
Furthermore, at least one part of the second insulating member 5 is formed into a meltable insulating part 51, the first connecting piece 4 is in contact with the meltable insulating part 51 in a stop way, when the temperature of the battery reaches a safety limit temperature, the meltable insulating part 51 is melted to short-circuit the first connecting piece 4 and the substrate 1, and further a short circuit is generated between the first pole unit 11 and the second pole unit 12, energy generated by the power battery can be actively released through the conducting strip 2, and further the thermal spread of the power battery is prevented, so that the purpose of protecting the power battery is achieved. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the related art, two schemes are generally adopted for protecting the battery from fire and explosion, namely, the battery is provided with an explosion-proof valve, and the battery is provided with an OSD device. The explosion-proof valve in the first scheme cannot solve the combustion problem of the battery and cannot solve the heat spreading inside the battery pack because the explosion of the battery is caused by the fact that the short circuit of the positive electrode and the negative electrode is caused by certain factors, so that energy is released instantly in the form of heat and gas to generate combustion and explosion. The OSD device in the second scheme has a complex structure and is only effective for testing, and does not play any protection role in actual short circuit combustion explosion inside the battery and ignition explosion caused by heat spreading. And the utility model discloses power battery's safe cover plate subassembly 100's simple structure takes place to melt through can melting insulating part 51 and starts positive negative pole short circuit, realizes initiatively releasing power battery energy, and then hinders the inside heat of power battery and stretch, promotes power battery's security.
According to the utility model discloses power battery's safe apron subassembly 100's simple structure takes place to melt through can melting insulating part 51 and starts positive negative pole short circuit, realizes initiatively releasing power battery energy, and then hinders power battery's heat and stretch, reaches protection power battery's purpose.
According to the utility model discloses a power battery's safe cover plate subassembly 100, second insulator 5 and first connecting piece 4 joint link to each other, can guarantee the reliability of being connected between second insulator 5 and the first connecting piece 4 like this, and the dismouting is more convenient.
According to the safety cover plate assembly 100 of the power battery of an embodiment of the present invention, as shown in fig. 2, the first connecting plate 4 includes: the fixing portion 41 and the extending portion 42, wherein the fixing portion 41 is fixedly connected to the second pole unit 12, so that the first connecting piece 4 and the second pole unit 12 can be electrically connected. Further, one end of the extending portion 42 is connected to the fixing portion 41, the other end of the extending portion 42 extends toward the first pole unit 11, and an end of the extending portion 42 is bent downward and adapted to be in abutting contact with the meltable insulation portion 51. When the temperature of the power battery exceeds the safety limit temperature, the meltable insulation part 51 melts, so that the first connecting piece 4 is in contact with the substrate 1 and is in short-circuit connection, thereby realizing instant release of controllable energy and rapidly enabling the power battery to reach a safe state.
Further, the meltable insulation part 51 is formed as a polycaprolactone layer or a rubber-plastic foam layer, which can ensure that the melting point of the meltable insulation part 51 is at the target temperature for triggering the release of energy.
According to the safety cover plate assembly 100 of the power battery of an embodiment of the present invention, as shown in fig. 2, the extension portion 42 includes: a main body 421 and two extending limbs 422, wherein the main body 421 is provided with a groove 6 opening towards one side of the first pole unit 11, and the groove 6 can form an avoiding space. Further, two extension limbs 422 are established in the both sides of recess 6 and are extended to one side of keeping away from this body portion 421 respectively, and the tip of every extension limb 422 all ends the butt with can melting insulating part 51 and touch, like this, when the battery temperature was too high, with two corresponding can melting insulating part 51 of extension limb 422 all can take place to melt, and then realize the short circuit, promote corresponding speed, it is more sensitive to ensure that the battery obtains safety protection.
According to the utility model discloses a power battery's safe cover plate subassembly 100, as shown in fig. 3, the tip of extension limb 422 is equipped with the butt face 7 towards one side of base plate 1, and butt face 7 is suitable for and contacts with base plate 1 in order to release electric current after can melting insulating part 51 melts. Specifically, the size of the area of the abutment surface 7 depends on the resistance value of the substrate 1 and a current target value for controlling the energy release rate.
According to the utility model discloses a power battery's safe cover plate subassembly 100, as shown in fig. 2, be equipped with a plurality of buckles 52 on second insulator 5, wherein a plurality of buckles 52 are located every extension limb 422's both sides respectively and can block corresponding extension limb 422, can guarantee the reliability of being connected between first connecting piece 4 and the base plate 1 like this, and the dismouting is more convenient simultaneously. In the description of the present invention, "a plurality" means two or more.
The safety cover plate assembly 100 of the power battery according to an embodiment of the present invention, as shown in fig. 2, further includes: and a second connecting sheet 8, wherein the second connecting sheet 8 is connected to the second pole unit 12, so that the second connecting sheet 8 and the second pole unit 12 are electrically connected. Further, the second connecting piece 8 is located on a side of the substrate 1 facing away from the conductive member 2, and both the second connecting piece 8 and the first connecting piece 4 are located on the same side of the substrate 1. Further, the first connecting piece 4 and the second connecting piece 8 are arranged on the substrate 1 in bilateral symmetry. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In conclusion, according to the utility model discloses power battery's safe apron subassembly 100 simple structure, when power battery's temperature exceeded safety limit temperature, power battery release's energy can make can melt insulating part 51 and melt, takes place to melt the short circuit that realizes first connecting piece 4 and base plate 1 and then starts positive negative pole short circuit through can melting insulating part 51, and then initiatively releases power battery energy, and the heat that stops power battery spreads to reach the purpose that promotes power battery security.
The utility model discloses the second aspect still provides a power battery, include: the box, a plurality of battery module unit, wherein inject in the box and hold the chamber, a plurality of battery module unit establish and hold the intracavity, all are equipped with anodal utmost point post and negative pole post on every battery module unit. Further, the safety cover plate assembly 100 includes a plurality of first pole units 11 of each safety cover plate assembly 100 are connected to the negative pole of one of the two adjacent battery module units, and the second pole units 12 of each safety cover plate assembly 100 are connected to the positive pole of the other of the two adjacent battery module units. Further, the power battery also comprises the safety cover plate assembly 100 of the power battery, so that the advantages of high battery safety performance and the like are achieved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A safety cover plate assembly (100) for a power battery, comprising:
the electric connector comprises a substrate (1), wherein a first pole unit (11) is arranged at one end of the substrate (1), a second pole unit (12) is arranged at the other end of the substrate (1), a conductive piece (2) is arranged between the first pole unit (11) and the substrate (1), and a first insulating piece (3) is arranged between the second pole unit (12) and the substrate (1);
a first connecting piece (4), wherein the first connecting piece (4) is connected to the second pole unit (12), and the first connecting piece (4) is positioned on one side of the substrate (1) opposite to the first insulating piece (3);
a second insulating member (5), the second insulating member (5) being provided between the first connecting piece (4) and the base plate (1) to separate the first connecting piece (4) and the base plate (1), at least a part of the second insulating member (5) being formed as a fusible insulation portion (51), the first connecting piece (4) and the fusible insulation portion (51) coming into contact with each other at a dead end, the fusible insulation portion (51) being fused to short-circuit the first connecting piece (4) and the base plate (1) when the temperature of the battery reaches a safety limit temperature.
2. The safety cover plate assembly (100) for power batteries according to claim 1, wherein the second insulating member (5) and the first connecting piece (4) are connected in a snap-fit manner.
3. The safety cover plate assembly (100) of a power battery according to claim 1, wherein the first connecting plate (4) comprises:
a fixing part (41), wherein the fixing part (41) is fixedly connected with the second pole unit (12);
an extension portion (42), one end of the extension portion (42) is connected with the fixing portion (41), the other end of the extension portion (42) extends towards the first pole unit (11), and the end portion of the extension portion (42) is bent downwards and is suitable for being in abutting contact with the meltable insulation portion (51).
4. The safety cover plate assembly (100) of a power battery according to claim 3, wherein the extension (42) comprises:
a body portion (421), wherein a groove (6) which is opened towards one side of the first pole unit (11) is arranged on the body portion (421);
the two extending limbs (422) are arranged on two sides of the groove (6) and extend towards one side far away from the body part (421), and the end part of each extending limb (422) is in abutting contact with the meltable insulation part (51).
5. The safety cover plate assembly (100) for a power battery according to claim 4, characterized in that the end of the extension limb (422) facing the base plate (1) is provided with an abutment surface (7), the abutment surface (7) being adapted to contact the base plate (1) to release current after the meltable insulation (51) has melted.
6. The safety cover plate assembly (100) for power battery according to claim 4, wherein a plurality of buckles (52) are arranged on the second insulating member (5), and a plurality of buckles (52) are respectively arranged at two sides of each extension limb (422) and can be clamped with the corresponding extension limb (422).
7. The safety cover plate assembly (100) of a power battery according to claim 1, further comprising: the second connecting piece (8), the second connecting piece (8) is connected on the second pole column unit (12), the second connecting piece (8) is located the base plate (1) one side of conducting piece (2) dorsad, just the second connecting piece (8) with first connecting piece (4) all are located the same side of base plate (1).
8. The safety cover plate assembly (100) of a power battery according to claim 7, wherein the first connecting plate (4) and the second connecting plate (8) are arranged on the base plate (1) in bilateral symmetry.
9. The safety cover plate assembly (100) for a power battery according to any one of claims 1-8, wherein the meltable insulation (51) is formed as a polycaprolactone layer or a rubber-plastic foam layer.
10. A power cell, comprising:
the box body is internally provided with an accommodating cavity;
the battery module units are arranged in the accommodating cavity, and each battery module unit is provided with a positive pole column and a negative pole column;
the safety cover plate assembly (100) for a power battery according to any one of claims 1 to 9, wherein the safety cover plate assembly (100) comprises a plurality of safety cover plate assemblies, the first pole unit (11) of each safety cover plate assembly (100) is connected with the negative pole terminal of one of two adjacent battery module units, and the second pole unit (12) of each safety cover plate assembly (100) is connected with the positive pole terminal of the other of two adjacent battery module units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922084510.2U CN211125702U (en) | 2019-11-27 | 2019-11-27 | Power battery's safe apron subassembly and have its power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922084510.2U CN211125702U (en) | 2019-11-27 | 2019-11-27 | Power battery's safe apron subassembly and have its power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211125702U true CN211125702U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922084510.2U Active CN211125702U (en) | 2019-11-27 | 2019-11-27 | Power battery's safe apron subassembly and have its power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211125702U (en) |
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2019
- 2019-11-27 CN CN201922084510.2U patent/CN211125702U/en active Active
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