CN220367871U - Thermal transfer switch and battery pack - Google Patents
Thermal transfer switch and battery pack Download PDFInfo
- Publication number
- CN220367871U CN220367871U CN202321995624.2U CN202321995624U CN220367871U CN 220367871 U CN220367871 U CN 220367871U CN 202321995624 U CN202321995624 U CN 202321995624U CN 220367871 U CN220367871 U CN 220367871U
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- thermal transfer
- transfer switch
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- thermal
- conversion mechanism
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- 230000007246 mechanism Effects 0.000 claims abstract description 115
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 229910045601 alloy Inorganic materials 0.000 claims description 22
- 239000000956 alloy Substances 0.000 claims description 22
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000003313 weakening effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910000597 tin-copper alloy Inorganic materials 0.000 description 1
- 229910001174 tin-lead alloy Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
Landscapes
- Fuses (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to the technical field of electric device protection, in particular to a thermal transfer switch and a battery pack. The utility model discloses a thermal transfer switch and a battery pack, wherein the thermal transfer switch comprises a public end, a normally closed end, a normally open end, a transfer mechanism, a thermal trigger mechanism and a driving mechanism, wherein the public end and the normally closed end are normally closed, the public end and the normally open end are normally open, and the thermal trigger mechanism is used for triggering the driving mechanism to drive the transfer mechanism to move to switch the public end and the normally closed end into an open state and switch the public end and the normally open end into a closed state when the temperature exceeds a set value. The thermal transfer switch can realize that the electrical devices with thermal anomalies in the multi-stage series electrical devices (such as the battery cells) are independently removed without affecting the continuous use of other electrical devices, and the safety and the reliability are improved.
Description
Technical Field
The utility model belongs to the technical field of electric device protection, and particularly relates to a thermal transfer switch and a battery pack.
Background
Because of the limitation of the voltage and the capacity of the single battery, in order to meet the requirements of high voltage and large capacity of electric equipment and an energy storage system, the lithium battery is usually used in a serial, parallel or serial-parallel mixed mode. However, the lithium battery inevitably has inconsistencies during the manufacturing process, and the degree of such inconsistencies is gradually amplified as the cycle life increases with the increase in the service time. In electric automobile, lithium cell's group mainly adopts monomer battery (3.7V), improves the demand that voltage realized the capacity through the series connection, and in multistage series connection framework, when single battery is unusual, under current aluminium bar, copper bar's connected mode, can't carry out single battery and reject unusually, can only carry out outside shutoff all batteries, or the battery that just is unusual reacts inside, further becomes invalid, takes place thermal runaway or triggers the emergence of thermal diffusion, leads to more battery unusual, even causes the incident.
Disclosure of Invention
The present utility model is directed to a thermal transfer switch and a battery pack for solving the above-mentioned problems.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a thermal transfer switch, includes public end, normal close end, normal open end, shifter, thermal trigger mechanism and actuating mechanism, public end and normal close end normal close setting, public end and normal open end normal open setting, thermal trigger mechanism is used for when the temperature exceeds the setting value, triggers actuating mechanism drive shifter motion and switches public end and normal close end to the disconnection state, switches public end and normal open end to the closure state.
Further, the driving mechanism is realized by adopting an elastic mechanism.
Further, the driving mechanism is realized by a spring.
Further, the thermal trigger mechanism includes a low melting point alloy.
Further, the low-melting-point alloy is welded and fixed with the conversion mechanism to limit the movement of the conversion mechanism; or the low-melting-point alloy is arranged as a supporting block, and the supporting block supports the conversion mechanism to limit the movement of the conversion mechanism.
Further, the thermal triggering mechanism comprises a temperature sensing body and an elastic buckling mechanism, the elastic buckling mechanism is clamped with the conversion mechanism to limit the movement of the conversion mechanism, and the temperature sensing body is used for melting when the temperature exceeds a set value so that the buckling mechanism is elastic and is tripped with the conversion mechanism.
Further, the thermal trigger mechanism further comprises a heater for controlled heating of the thermal trigger mechanism.
Further, the motion of the conversion mechanism is linear motion, swinging motion or rotation.
Furthermore, the motion of the conversion mechanism is linear motion, the conversion mechanism is an electric connection rod, through holes are respectively formed in the public end, the normally-closed end and the normally-open end, and the electric connection rod can be movably arranged in a penetrating mode with the through holes to be correspondingly electrically connected.
Further, the motion of the conversion mechanism is swinging, the conversion mechanism is a conductive swinging block, the swinging block is arranged on the public end in a swinging way and is electrically connected with the public end, the swinging block is in electric shock connection with the normally closed end, and under the driving of the driving mechanism, the swinging block can swing to be in electric shock connection with the normally open end and be in disconnection with the normally closed end.
Further, in the process of driving the conversion mechanism to move by the driving mechanism, the conversion mechanism firstly switches the public end and the normally open end into a closed state and then switches the public end and the normally closed end into an open state.
Further, a current carrying weakened area is arranged in the loops of the common end and the normally closed end.
Further, the current-carrying weakened region is formed by using a low-melting-point alloy or a narrow-diameter structure.
The utility model also discloses a battery pack, which comprises a plurality of electric cores and the thermal transfer switch, wherein the electric cores are respectively connected in series through the thermal transfer switch, a switch loop formed by a public end and a normally closed end is arranged in a main loop of the electric core, and the switch loop formed by the public end and the normally open end is connected in parallel with the electric core.
The beneficial technical effects of the utility model are as follows:
by adopting the thermal transfer switch, the electrical devices with thermal anomalies in the multi-stage series electrical devices (such as the battery cells) can be independently removed without affecting the continuous use of other electrical devices, and the safety and reliability are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the thermal transfer switch of the present utility model (before operation);
fig. 2 is a simplified view of the structure of the thermal transfer switch of the present utility model (in operation);
fig. 3 is a simplified view of the thermal transfer switch of the present utility model (after operation);
FIG. 4 is a schematic diagram of the connection of the thermal transfer switch of the present utility model in a multi-stage series circuit of cells;
fig. 5 is a block diagram (before operation) of a thermal transfer switch according to the first embodiment of the present utility model;
fig. 6 is a block diagram (in operation) of a thermal transfer switch according to a first embodiment of the present utility model;
fig. 7 is a block diagram of a thermal transfer switch (after operation) according to the first embodiment of the present utility model;
fig. 8 is a block diagram (before operation) of a thermal transfer switch according to a second embodiment of the present utility model;
fig. 9 is a block diagram (in operation) of a thermal transfer switch according to a second embodiment of the present utility model;
fig. 10 is a block diagram of a thermal transfer switch (after operation) according to a second embodiment of the present utility model;
fig. 11 is a simplified view of a thermal transfer switch according to a third embodiment of the present utility model;
FIG. 12 is a simplified illustration of a thermal transfer switch according to other embodiments of the present utility model;
fig. 13 is a simplified view of a thermal transfer switch according to a fourth embodiment of the present utility model;
FIG. 14 is a simplified illustration of a thermal transfer switch according to another embodiment of the present utility model;
FIG. 15 is a simplified illustration of a thermal transfer switch according to another embodiment of the present utility model;
FIG. 16 is a simplified illustration of a thermal transfer switch according to another embodiment of the present utility model;
fig. 17 is a structural view of the battery pack of the present utility model.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The utility model will now be further described with reference to the drawings and detailed description.
As shown in fig. 1-4, the thermal transfer switch comprises a public terminal 1, a normally closed terminal 2, a normally open terminal 3, a transfer mechanism 4, a thermal trigger mechanism 5 and a driving mechanism 6, wherein the public terminal 1 and the normally closed terminal 2 are normally closed, the public terminal 1 and the normally open terminal 3 are normally open, the thermal trigger mechanism 5 is used for triggering when the temperature exceeds a set value, the driving mechanism 6 drives the transfer mechanism 4 to move so as to switch the public terminal 1 and the normally closed terminal 2 into an open state, and the public terminal 1 and the normally open terminal 3 are switched into a closed state.
When the battery cell 7 is used, the circuit of the public end 1 and the normally closed end 2 is connected with the next battery cell 7 in series, the circuit of the public end 1 and the normally open end 3 is connected with the battery cell 7 in parallel, specifically, the positive electrode of the battery cell 7 is connected with the normally closed end 2, the public end 1 is connected with the negative electrode of the next battery cell 7, the normally open end 3 is connected with the negative electrode of the battery cell 7, as shown in fig. 4, when the battery cell 7 abnormally heats, heat is transferred to the thermal triggering mechanism 5, when the temperature exceeds a set value, the thermal triggering mechanism 5 triggers, the driving mechanism 6 drives the conversion mechanism 4 to move so as to switch the public end 1 and the normally closed end 2 into an open state, the public end 1 and the normally open end 3 are switched into a closed state, and the battery cell 7 is bypassed, so that the battery cell 7 is independently removed and the continuous use of other battery cells 7 is not influenced, and the safety and the reliability are improved.
Preferably, in the process of driving the switching mechanism 4 by the driving mechanism 6 to move, the switching mechanism 4 firstly switches the common terminal 1 and the normally open terminal 3 into a closed state (as shown in fig. 2) and then switches the common terminal 1 and the normally closed terminal 2 into an open state (as shown in fig. 3), so that the whole main circuit of the battery cell is not powered down in the switching process, and the reliability is improved.
The movement of the conversion mechanism 4 may be linear movement, swinging or rotating, etc.
The thermal transfer switch of the present utility model will be described in detail by way of specific examples.
Example 1
As shown in fig. 5 to 7, a thermal transfer switch includes a common terminal 1, a normally closed terminal 2, a normally open terminal 3, a transfer mechanism 4, a thermal trigger mechanism 5 and a driving mechanism 6, in this embodiment, the transfer mechanism 4 is an electrical connection rod 41, the electrical connection rod 41 is in a straight rod structure, the common terminal 1, the normally closed terminal 2 and the normally open terminal 3 are respectively provided with through holes, the normally closed terminal 2, the common terminal 1 and the normally open terminal 3 are respectively and movably sleeved on the electrical connection rod 41 in sequence through the through holes, the normally closed terminal 2, the common terminal 1 and the normally open terminal 3 are arranged at intervals, the normally closed terminal 2 and the common terminal 1 are in a normally closed state by performing contact electrical connection through the electrical connection rod 41, the normally open terminal 3 is insulated from the electrical connection rod 41, and by adopting the structure, the movement of the electrical connection rod 41 is more stable and reliable, but not limited thereto.
In this embodiment, the rod body of the electrical connecting rod 41 is made of conductive material, such as copper, aluminum, etc., and the outer surface of the rod body of the electrical connecting rod 41 in the through hole of the normally open end 3 is coated with the insulating layer 8, so that the normally open end 3 is insulated from the electrical connecting rod 41, and the electrical connecting rod is simple in structure, easy to manufacture, and good in electrical conductivity, but not limited thereto, in some embodiments, the electrical connecting rod 41 may be made of non-conductive material, and the outer peripheral surface is provided with a conductive layer. The insulating layer 8 may be made of a material such as ceramic or plastic.
The thermal trigger mechanism 5 is implemented by using a low-melting-point alloy 51, the low-melting-point alloy 51 welds and fixes the electrical connection rod 41 on the normally-closed end 2, and the low-melting-point alloy 51 can be tin-copper alloy, tin-lead alloy or tin-bismuth alloy, etc., which is easy to implement and has good fusing effect, but is not limited to, in some embodiments, the low-melting-point alloy 51 can also be replaced by other low-melting-point metals, such as lead, tin or zinc, etc.
The driving mechanism 6 is preferably a compression spring 61, which has simple structure, easy realization and low cost, the compression spring 61 is sleeved on the electric connecting rod 41, and two ends of the compression spring 61 are respectively compressed and abutted between the public end 1 and the electric connecting rod 41, so as to apply a force for linear motion towards the normal open end 3 to the electric connecting rod 41. Of course, in other embodiments, the compression spring 61 may be disposed at other locations, such as between the normally closed end 2 and the electrical connection rod 41, etc. In other embodiments, the drive mechanism 6 may be implemented using other elastic mechanisms, such as a spring plate, a tension spring, and the like.
When the electric core 7 is abnormally heated, heat is transferred to the low-melting-point alloy 51 through the normally-closed end 2, when the temperature exceeds a set value, the low-melting-point alloy 51 melts, the fixed connection between the electric connecting rod 41 and the normally-closed end 2 is released, the electric connecting rod 41 starts to linearly move towards the direction of the normally-closed end 3 under the pushing of the elastic restoring force of the compression spring 61, the conductive part of the electric connecting rod 41 enters a through hole of the normally-closed end 3 to be in contact electrical connection with the normally-closed end 3, the normally-closed end 3 is electrically connected with the common end 1, at the moment, the connecting rod 41 is also electrically connected with the normally-closed end 2, as shown in fig. 6, the electric connecting rod 41 continuously moves until the connecting rod 41 is separated from the normally-closed end 2 to disconnect the normally-closed end 2, as shown in fig. 7, and the electric core 7 is bypassed and is independently removed.
Further, in this embodiment, the normally closed end 2 is provided with the current-carrying weakened area 9, and since the normally closed end 2 and the normally open end 3 are simultaneously contacted in the linear movement process of the electrical connection rod 41, the two poles of the protected battery cell are short-circuited, the current-carrying weakened area 9 can be fused during the short circuit, and the safety is improved.
In the present embodiment, the current-carrying weakened region 9 is formed by punching the normally closed end 2 using the narrow diameter structure 91, but is not limited thereto.
Of course, in some embodiments, the current-carrying weakened region 9 may also be implemented by using a low-melting-point alloy 92, as shown in fig. 14, which has the advantage of low temperature rise; in other embodiments, the current carrying weakened region 9 may be provided at other locations in the circuit between the common end 1 and the normally closed end 2, as shown in fig. 15 and 16.
Further, in this embodiment, the crown springs 100 are respectively and fixedly arranged in the through holes of the common end 1, the normally closed end 2 and the normally open end 3, and the electric connecting rod 41 is movably inserted into the crown springs 100, so as to further improve the electric contact performance.
Of course, in some embodiments, the low melting point alloy 51 may be provided as a supporting block structure, supported on the end surface of the electric connection rod 41 near the normal end 3 to limit the movement of the electric connection rod 41, and when the low melting point alloy 51 melts, the electric connection rod 41 can move under the pushing of the elastic restoring force of the compression spring 61.
Example two
As shown in fig. 8-10, the main difference between this embodiment and the first embodiment is that: the switching mechanism 4 is a conductive swinging block 42, the swinging block 42 is swingably arranged on the common terminal 1 and is electrically connected with the common terminal 1, the swinging block 42 is electrically connected with the normally closed terminal 2 in a contact way, is welded and fixed through a low-melting-point alloy (not shown in the figure), and can swing to be electrically connected with the normally open terminal 3 in a contact way and be disconnected from the normally closed terminal 2 under the driving of the driving mechanism (not shown in the figure).
The driving mechanism is preferably a compression spring, has simple structure, is easy to realize and has low cost, but is not limited to the compression spring, and in some embodiments, the driving mechanism can also be realized by adopting other elastic mechanisms, such as a shrapnel, an extension spring and the like.
The swinging block 42 can be made of conductive materials, such as copper, aluminum and other metals, and has simple structure and easy realization.
When the battery cell 7 is abnormally heated, heat is transferred to the low-melting-point alloy through the normally-closed end 2, when the temperature exceeds a set value, the low-melting-point alloy is melted, the fixed connection between the swinging block 42 and the normally-closed end 2 is released, the swinging block 42 swings towards the direction of the normally-closed end 3 under the pushing of the elastic restoring force of the driving mechanism, so that the swinging block 42 is in contact electrical connection with the normally-closed end 3, at the moment, the swinging block 42 is also in electrical connection with the normally-closed end 2, as shown in fig. 9, the swinging block 42 continues swinging until the swinging block 42 is separated from the normally-closed end 2 to disconnect the normally-closed end 2, as shown in fig. 10, and the battery cell 7 is bypassed and is independently removed.
Of course, in other embodiments, the conversion mechanism 4 may be driven by a driving mechanism to perform other movements such as rotation.
Example III
As shown in fig. 11, the main difference between the present embodiment and the first embodiment is that: the thermal triggering mechanism 5 of the present embodiment includes a temperature sensing body 52 and an elastic buckling mechanism 53, the elastic buckling mechanism 53 is clamped with the switching mechanism 4 to limit the movement of the switching mechanism 4, the temperature sensing body 52 has a block structure, and abuts against the elastic buckling mechanism 53 to enable the elastic buckling mechanism 53 to be clamped with the switching mechanism 4, when the temperature exceeds a set value, the temperature sensing body 52 melts to enable the elastic buckling mechanism 53 to reset and trip from the switching mechanism 4. With this thermal trigger mechanism 5, the softening process of the temperature sensing body 52 does not affect the contact pressure changes of the common terminal 1, the normally closed terminal 2, and the normally open terminal 3.
Fig. 12 shows another structure of the elastic latching mechanism 53, however, in other embodiments, the elastic latching mechanism 53 may be implemented using other elastic latching mechanism structures.
Example IV
As shown in fig. 13, the main difference between the present embodiment and the first embodiment is that: the thermal triggering mechanism 5 of the embodiment further includes a heater 54, which is used for heating the thermal triggering mechanism 5 in a controlled manner, the heater 54 can be connected with a control system of the battery pack, and the control system of the battery pack controls the heater to heat and trigger the thermal transfer switch to transfer, so as to actively reject the abnormal battery cells.
In the present embodiment, the heater 52 is implemented by a heating wire, which is wound around the thermal trigger mechanism 5, but is not limited thereto.
As shown in fig. 4 and 17, the utility model also discloses a battery pack, which comprises a plurality of electric cores 7 and the thermal transfer switch of the first embodiment, wherein the electric cores 7 are sequentially connected in series through the thermal transfer switch respectively, a switch loop formed by a public end 1 and a normally-closed end 2 is arranged in a main loop of the electric core 7, the switch loop formed by the public end 1 and the normally-open end 3 is arranged in parallel with the electric core 7, specifically, the positive electrode of the electric core 7 is connected with the normally-closed end 2, the public end 1 is connected with the negative electrode of the next electric core 7, and the normally-open end 3 is connected with the negative electrode of the electric core 7.
When the battery cell 7 abnormally heats, heat is transferred to the low-melting-point alloy 51 through the normally-closed end 2, when the temperature exceeds a set value, the low-melting-point alloy 51 is melted, the fixed connection between the electric connecting rod 41 and the normally-closed end 2 is released, the electric connecting rod 41 starts to linearly move towards the direction of the normally-closed end 3 under the pushing of the elastic restoring force of the compression spring 61, the conductive part of the electric connecting rod 41 enters a through hole of the normally-closed end 3 to be in contact electrical connection with the normally-open end 3, so that the normally-closed end 3 is electrically connected with the common end 1, at the moment, the connecting rod 41 is also electrically connected with the normally-closed end 2, as shown in fig. 6, the electric connecting rod 41 continues to move until the connecting rod 41 is separated from the normally-closed end 2 to disconnect the normally-closed end 2, as shown in fig. 7, and the battery cell 7 is bypassed and is independently removed.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (14)
1. A thermal transfer switch, characterized by: the temperature-controlled switching device comprises a public end, a normally closed end, a normally open end, a switching mechanism, a thermal triggering mechanism and a driving mechanism, wherein the public end and the normally closed end are normally closed, the public end and the normally open end are normally opened, the thermal triggering mechanism is used for triggering the driving mechanism to drive the switching mechanism to move when the temperature exceeds a set value so as to switch the public end and the normally closed end into an open state and switch the public end and the normally open end into a closed state.
2. The thermal transfer switch of claim 1, wherein: the driving mechanism is realized by adopting an elastic mechanism.
3. The thermal transfer switch of claim 2, wherein: the driving mechanism is realized by a spring.
4. The thermal transfer switch of claim 1, wherein: the thermal trigger mechanism includes a low melting point alloy.
5. The thermal transfer switch of claim 4, wherein: the low-melting-point alloy is welded and fixed with the conversion mechanism to limit the movement of the conversion mechanism; or the low-melting-point alloy is arranged as a supporting block, and the supporting block supports the conversion mechanism to limit the movement of the conversion mechanism.
6. The thermal transfer switch of claim 1, wherein: the thermal triggering mechanism comprises a temperature sensing body and an elastic buckling mechanism, the elastic buckling mechanism is clamped with the conversion mechanism to limit the movement of the conversion mechanism, and the temperature sensing body is used for melting when the temperature exceeds a set value so that the elastic buckling mechanism resets to trip the conversion mechanism.
7. The thermal transfer switch of claim 1 or 4 or 6, wherein: the thermal trigger mechanism further includes a heater for controlled heating of the thermal trigger mechanism.
8. The thermal transfer switch of claim 1, wherein: the motion of the conversion mechanism is linear motion, swinging or rotation.
9. The thermal transfer switch of claim 8, wherein: the motion of the conversion mechanism is linear motion, the conversion mechanism is an electric connection rod, through holes are respectively formed in the public end, the normally-closed end and the normally-open end, and the electric connection rod can be movably arranged in a penetrating mode with the through holes to be correspondingly electrically connected.
10. The thermal transfer switch of claim 8, wherein: the motion of the conversion mechanism is swinging, the conversion mechanism is a conductive swinging block, the swinging block is arranged on the public end in a swinging way and is electrically connected with the public end, the swinging block is electrically connected with the normally closed end, and under the driving of the driving mechanism, the swinging block can swing to be electrically connected with the normally open end and be disconnected with the normally closed end.
11. The thermal transfer switch of claim 1, wherein: in the process of driving the conversion mechanism to move by the driving mechanism, the conversion mechanism firstly switches the public end and the normally open end into a closed state and then switches the public end and the normally closed end into an open state.
12. The thermal transfer switch of claim 11, wherein: and current carrying weakening areas are arranged in the loops of the common end and the normally closed end.
13. The thermal transfer switch of claim 12, wherein: the current carrying weakened area is formed by adopting low-melting point alloy or adopting narrow-diameter structure.
14. A battery pack comprising a plurality of cells, characterized in that: the thermal transfer switch of any one of claims 1-13, wherein the plurality of cells are sequentially connected in series through the thermal transfer switch, a switch loop formed by the common terminal and the normally closed terminal is arranged in a main loop of the cells, and the switch loop formed by the common terminal and the normally open terminal is arranged in parallel with the cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995624.2U CN220367871U (en) | 2023-07-27 | 2023-07-27 | Thermal transfer switch and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995624.2U CN220367871U (en) | 2023-07-27 | 2023-07-27 | Thermal transfer switch and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220367871U true CN220367871U (en) | 2024-01-19 |
Family
ID=89512368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321995624.2U Active CN220367871U (en) | 2023-07-27 | 2023-07-27 | Thermal transfer switch and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220367871U (en) |
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2023
- 2023-07-27 CN CN202321995624.2U patent/CN220367871U/en active Active
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