CN222015636U - Battery structure - Google Patents
Battery structure Download PDFInfo
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- CN222015636U CN222015636U CN202420298231.4U CN202420298231U CN222015636U CN 222015636 U CN222015636 U CN 222015636U CN 202420298231 U CN202420298231 U CN 202420298231U CN 222015636 U CN222015636 U CN 222015636U
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- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 16
- 238000005265 energy consumption Methods 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000012212 insulator Substances 0.000 claims 3
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 230000002542 deteriorative effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
Classifications
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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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The present utility model relates to a battery structure comprising: the device comprises a shell, a pole core, a positive electrode connecting component, a negative electrode connecting component and a protecting device; the pole core is arranged in the shell, and the positive pole lug and the negative pole lug are led out from the pole core; the positive electrode connecting component and the negative electrode connecting component are respectively provided with at least one part exposed out of the shell; one end of the protection device is connected with the positive electrode connecting component, the other end of the protection device is connected with the negative electrode connecting component, and the protection device has an open circuit state and a short circuit state; when the temperature in the shell is at a normal temperature, the protection device is in an open circuit state, the circuit is opened between the positive electrode lug and the negative electrode lug, and the positive electrode connecting component and the negative electrode connecting component are respectively communicated with the positive electrode lug and the negative electrode lug; when the temperature in the shell is greater than or equal to the threshold temperature, the protection device is in a short circuit state, the positive electrode lug is communicated with the negative electrode lug, and the positive electrode connecting assembly is disconnected with the positive electrode lug. The battery structure provided by the utility model can prevent the situation from further deteriorating when the temperature of the battery is abnormal, and improves the safety of the battery.
Description
Technical Field
The utility model relates to the technical field of battery protection, in particular to a battery structure.
Background
The lithium ion battery has the advantages of high energy density, high capacity, small volume, environmental protection and the like, and is widely applied to the field of new energy automobiles at present. In order to ensure the safety performance of the lithium battery, reasonable protection design is required.
When abnormal conditions such as short circuit occur in the battery, local thermal runaway is caused, other side reactions are further induced, the internal pressure of the battery is increased, and safety accidents such as explosion or fire are caused when serious.
In view of this, it is necessary to design a battery structure having a high temperature protection function.
Disclosure of utility model
It is an object of the present utility model to provide a battery structure that solves at least one of the problems of the background art.
According to an aspect of the present utility model, there is provided a battery structure including:
The battery pack comprises a shell and a pole core, wherein a sealed cavity is formed in the shell, the pole core is arranged in the cavity, and a positive pole lug and a negative pole lug are led out of the pole core;
The positive electrode connecting component and the negative electrode connecting component are respectively at least partially exposed out of the shell;
One end of the protection device is connected with the positive electrode connecting component, the other end of the protection device is connected with the negative electrode connecting component, and the protection device is provided with an open circuit state and a short circuit state;
When the temperature in the cavity is smaller than a threshold value temperature, the protection device is in the open-circuit state, the positive electrode lug and the negative electrode lug are open-circuit, and the positive electrode connecting component and the negative electrode connecting component are respectively communicated with the positive electrode lug and the negative electrode lug;
When the temperature in the cavity is greater than or equal to the threshold temperature, the protection device is in the short circuit state, the positive electrode lug is communicated with the negative electrode lug, and the positive electrode connecting assembly is disconnected with the positive electrode lug.
Optionally, the protection device comprises a fuse and an initiating short circuit assembly;
The fuse is connected in series between the positive electrode connection and the positive electrode lug, one end of the starting short circuit component is communicated with the positive electrode lug, and the other end of the starting short circuit component is communicated with the negative electrode lug;
When the protection device is in the open-circuit state, the fuse is in an unblown state, and the positive electrode connecting component can be communicated with the positive electrode lug through the fuse;
When the protection device is in the short circuit state, the starting short circuit component enables the positive electrode lug to be communicated with the negative electrode lug and enables the fuse to be fused.
Optionally, the positive electrode connecting component comprises a positive electrode connecting sheet, a positive electrode leading-out sheet and a positive electrode post, the positive electrode lug, the positive electrode connecting sheet, the positive electrode leading-out sheet, the fuse and the positive electrode post are sequentially connected in series, the positive electrode post is exposed out of the shell, and one end of the starting short circuit component is connected between the fuse and the positive electrode leading-out sheet;
the negative electrode connecting assembly comprises a negative electrode connecting sheet, a negative electrode leading-out sheet and a negative electrode column, wherein the negative electrode lug, the negative electrode connecting sheet, the negative electrode leading-out sheet and the negative electrode column are sequentially connected, the negative electrode column is exposed out of the shell, and the other end of the starting short circuit assembly is connected with the negative electrode connecting sheet.
Optionally, the battery structure further includes an energy dissipation member, and when the protection device is in the short circuit state, the energy dissipation member is connected in series between the positive electrode tab and the negative electrode tab, and the energy dissipation member is a resistive element.
Optionally, the start short circuit assembly comprises a support, a temperature deformation spring and a second connecting sheet;
The second connecting piece is movably connected to the supporting piece through the temperature deformation spring, the supporting piece is fixedly connected to the positive electrode leading-out piece, one end of the energy consumption piece is connected with the negative electrode connecting piece through a third connecting piece, and the other end of the energy consumption piece is connected with the first connecting piece;
When the protection device is in the open-circuit state, one end of the fuse is connected with the positive pole through a fourth connecting sheet, the other end of the fuse is connected with the positive pole leading-out sheet through the supporting piece, and the free end of the first connecting sheet is positioned near the second connecting sheet;
When the protection device is in the short circuit state, the temperature deformation spring is in an extending state, so that the second connecting piece moves to be in contact connection with the first connecting piece, the positive electrode lug is communicated with the negative electrode lug, and the fuse is fused.
Optionally, the positive pole is of a hollow structure, the positive pole leading-out piece is arranged at the bottom of the hollow structure, and a conductive element is arranged at the top of the hollow structure;
The fuse, the supporting piece and the temperature deformation spring are all located in the hollow structure, the fourth connecting piece is connected with the conductive element, and the energy dissipation piece is embedded on the shell.
Optionally, a guiding groove is formed on the support member, and the temperature deformation spring is fixed in the guiding groove, so that the second connecting piece can move along the guiding groove.
Optionally, the shell includes casing and apron, the casing with the apron lock forms sealedly the cavity, anodal post with the negative pole post expose in the apron, protection device set up in on the apron.
Optionally, the battery structure further includes an insulating member, the insulating member is disposed between the cover plate and the pole core, the positive tab passes through the insulating member and is connected with the positive connection sheet, and the negative tab passes through the insulating member and is connected with the negative connection sheet.
Optionally, when the temperature in the cavity is greater than or equal to the threshold temperature, the protection device is in the short-circuit state, the positive electrode tab and the negative electrode tab are communicated, and the negative electrode connection assembly and the negative electrode tab are disconnected.
The utility model has the technical effects that the protection device is arranged on the shell of the battery, so that when the temperature of the battery is greater than or equal to the threshold temperature, the positive electrode connecting component of the battery is disconnected from the positive electrode lug, and meanwhile, the positive electrode lug is communicated with the negative electrode lug, thereby not only preventing the abnormal condition of the battery from further deteriorating, but also preventing the abnormal condition from spreading, and improving the safety of the battery.
Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
Fig. 1 is a schematic view of a battery structure according to the present utility model.
Fig. 2 is an assembly diagram of a protection device and a cover plate according to the present utility model.
Fig. 3 is a schematic diagram of a protection device provided by the utility model in an open circuit state.
Fig. 4 is a schematic diagram of a protection device in a short circuit state according to the present utility model.
Reference numerals illustrate:
1. a battery 1; 2. a housing 2; 3. a cover plate 3; 31. a positive electrode lead-out sheet 31; 32. a positive electrode post 32; 321. a conductive element 321; 33. a negative electrode lead-out sheet 33; 34. a negative electrode column 34; 35. a fuse 35; 36. a fourth connecting piece 36; 37. activating the shorting assembly 37; 371. a first connection piece 371; 372. a temperature deformation spring 372; 373. a second connecting piece 373; 374. a third connecting piece 374; 375. support 375; 4. a pole piece 4; 51. a positive electrode connection sheet 51; 52. a negative electrode connecting piece 52; 61. a positive electrode tab 61; 62. a negative electrode tab 62; 7. an insulating member 7; 8. and energy consuming parts 8.
Detailed Description
Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1 to 4, according to an aspect of the present utility model, there is provided a battery structure including: the device comprises a shell, a pole core 4, a positive electrode connecting component, a negative electrode connecting component and a protecting device; a sealed cavity is formed in the shell, the pole core 4 is arranged in the cavity, and a positive pole lug 61 and a negative pole lug 62 are led out of the pole core 4; at least a part of the positive electrode connecting component and the negative electrode connecting component are respectively exposed out of the shell; one end of the protection device is connected with the positive electrode connecting component, and the other end of the protection device is connected with the negative electrode connecting component, and the protection device has an open circuit state (refer to fig. 3) and a short circuit state (refer to fig. 4); when the temperature in the cavity is smaller than a threshold value temperature, the protection device is in the open-circuit state, the positive electrode lug 61 and the negative electrode lug 62 are open-circuit, and the positive electrode connecting component and the negative electrode connecting component are respectively communicated with the positive electrode lug 61 and the negative electrode lug 62; when the temperature in the cavity is greater than or equal to the threshold temperature, the protection device is in the short circuit state, the positive electrode lug 61 and the negative electrode lug 62 are communicated, and the positive electrode connecting component and the positive electrode lug 61 are disconnected.
Specifically, in this embodiment, under the condition of normal temperature of the battery 1 (i.e. the temperature in the cavity is less than the threshold temperature, the magnitude of the threshold temperature may be set according to the actual working condition of the battery 1, usually 60-80 ℃, which is not limited in the present utility model), the protection device only connects the positive tab 61 and the positive connection component, and is connected between the positive tab 61 and the negative tab 62, and the inside is in an open circuit state, so that the positive tab 61 and the negative tab 62 are also in an open circuit state, and the battery 1 can be normally charged and discharged to the outside.
When a short circuit or other abnormal condition occurs in the battery 1 and causes local thermal runaway, the temperature in the cavity rises to be greater than or equal to the threshold temperature, and the protection device starts the protection mode, namely, the protection device is converted from the open circuit state to the short circuit state. At this time, the protection device can connect the positive tab 61 and the negative tab 62, and disconnect the positive connection component from the positive tab 61, even if the battery 1 is disconnected, the external charging and discharging of the battery 1 can be stopped in time, so as to avoid further deterioration of the local thermal runaway condition, and in addition, after the positive tab 61 and the negative tab 62 are connected, the residual electric energy in the battery 1 can be consumed, so that further spreading of abnormal conditions can be avoided, and the safety performance of the battery 1 is improved.
In the above embodiment, the process of converting the protection device from the open state to the short state may be implemented by an electronic control manner, or a temperature detection device may be provided, and when the temperature exceeds the threshold temperature, the open circuit between the positive tab 61 and the positive connection component is controlled in time, and the communication between the positive tab 61 and the negative tab 62 is controlled. It is also possible to use a heat sensitive element or a material which changes a certain property of the material due to temperature. For example, the disconnection of the positive electrode tab 61 and the positive electrode connection assembly may be achieved by providing a fuse, and the shorting of the positive electrode tab 61 and the negative electrode tab 62 may be achieved by thermally deforming a material, which may be specifically selected according to actual requirements, which is not limited in the present utility model. The battery 1 may be in the form of a lithium ion battery 1, or may be other types of batteries 1 that can adopt the present solution.
As shown in fig. 1 to 4, optionally, the protection device includes a fuse 35 and an initiating short circuit assembly 37, the fuse 35 is connected in series between the positive electrode connection and the positive electrode tab 61, one end of the initiating short circuit assembly 37 is communicated with the positive electrode tab 61, and the other end is communicated with the negative electrode tab 62; when the protection device is in the open state, the fuse 35 is in an unblown state, and the positive electrode connection component can be communicated with the positive electrode lug 61 through the fuse 35; when the protection device is in the short-circuit state, the activation short-circuit assembly 37 communicates the positive tab 61 with the negative tab 62 and fuses the fuse 35.
Specifically, in this embodiment, the fuse 35 is connected in series between the positive electrode connection component and the positive electrode tab 61, when the protection device is in a short circuit state, the positive electrode tab 61 and the negative electrode tab 62 are turned on, and the instant current of the on is large, so that the fuse 35 can be instantaneously fused, the disconnection of the positive electrode tab 61 and the positive electrode connection component is realized, and the working state of the battery 1 is timely cut off. The fuse 35 is connected in series between the positive electrode connection and the positive electrode tab 61, which means that one end of the fuse 35 is connected to the positive electrode tab 61 and the other end is connected to the positive electrode connection assembly, or that the fuse 35 is connected in series inside the positive electrode connection assembly, and is connected in series with the positive electrode tab 61 through the positive electrode connection assembly, which is not limited in this utility model.
Alternatively, as shown in fig. 1 to 4, the positive electrode connection assembly includes a positive electrode connection piece 51, a positive electrode lead-out piece 31, and a positive electrode post 32, wherein the positive electrode tab 61, the positive electrode connection piece 51, the positive electrode lead-out piece 31, the fuse 35, and the positive electrode post 32 are sequentially connected in series, the positive electrode post 32 is exposed from the housing, and one end of the start-up short circuit assembly 37 is connected between the fuse 35 and the positive electrode lead-out piece 31; the negative electrode connecting assembly comprises a negative electrode connecting sheet 52, a negative electrode leading-out sheet 33 and a negative electrode column 34, wherein the negative electrode lug 62, the negative electrode connecting sheet 52, the negative electrode leading-out sheet 33 and the negative electrode column 34 are sequentially connected, the negative electrode column 34 is exposed out of the shell, and the other end of the starting short circuit assembly 37 is connected with the negative electrode connecting sheet 52.
Specifically, in the present embodiment, the positive electrode post 32 and the negative electrode post 34 are exposed out of the housing to realize electrical connection with external electric equipment, and the positive electrode connecting piece 51 and the negative electrode connecting piece 52 can pass through the housing and are respectively connected with the positive electrode post 32 and the negative electrode post 34 exposed out of the housing 2 through the positive electrode lead-out piece 31 and the negative electrode lead-out piece 33, so as to reduce the production difficulty of the battery 1. In addition, it is also convenient to connect the fuse 35 in series between the positive electrode connection assembly and the positive electrode tab 61. In addition, the casing of the battery 1 is usually an aluminum casing, and in order to avoid the short circuit of the positive electrode and the negative electrode in the normal operation of the battery 1, the positive electrode connecting sheet 51 and the negative electrode connecting sheet 52 penetrating through the casing are respectively insulated from the casing.
In the above embodiment, the fuse 35 is connected in series between the positive electrode lead-out tab 31 and the positive electrode post 32, facilitating the production design of the structure of the battery 1.
Optionally, as shown in fig. 1 to 2, the battery structure further includes an energy dissipation member 8, where the energy dissipation member 8 is connected in series between the positive tab 61 and the negative tab 62 when the protection device is in the short-circuit state, and the energy dissipation member 8 is a resistive element.
Specifically, in the present embodiment, the energy dissipation member 8 is connected in series between the positive electrode tab 61 and the negative electrode tab 62, so that after the positive electrode tab 61 and the negative electrode tab 62 are connected, the energy dissipation member 8 can accelerate the consumption of the residual electric energy, and the control efficiency for the abnormal situation of the battery 1 is improved. Wherein the energy consuming element 8 may be any reasonable element with a resistance, which the present utility model is not limited to.
Optionally, as shown in fig. 1 to 4, the start-up shorting assembly 37 includes a support 375, a temperature deformation spring 372, and a second connecting tab 373; the second connecting piece 373 is movably connected to the support piece 375 through the temperature deformation spring 372, the support piece 375 is fixedly connected to the positive electrode lead-out piece 31, one end of the energy dissipation piece 8 is connected to the negative electrode connecting piece 52 through a third connecting piece 374, and the other end is connected to the first connecting piece 371; when the protection device is in the open state, one end of the fuse 35 is connected to the positive electrode post 32 through a fourth connecting piece 36, the other end is connected to the positive electrode lead-out piece 31 through the support 375, and the free end of the first connecting piece 371 is located near the second connecting piece; when the protection device is in the short-circuit state, the temperature deformation spring 372 is in an extended state, so that the second connection piece 373 is moved to be in contact with and connected to the first connection piece 371, the positive tab 61 is communicated with the negative tab 62, and the fuse 35 is fused.
Specifically, in the present embodiment, the main function of the start-up shorting assembly 37 is to control the connection state of the battery 1 with the outside and the connection state of the positive tab 61 with the negative tab 62 when the temperature inside the battery 1 is higher than the threshold temperature. I.e. the activation of the shorting assembly 37 enables on the one hand to detect the temperature inside the battery 1, i.e. inside the cavity, and on the other hand to determine the state it is in from the actual temperature. The detection of the temperature may be active, such as a temperature detection device, or passive, such as a change in characteristics based on a temperature change.
In this embodiment, the temperature deformation spring 372 is capable of being deformed (changing from a compressed state to an extended state) at a high temperature, and by utilizing this characteristic, the second connecting piece 373 with one end connected to the temperature deformation spring 372 can contact the first connecting piece 371, while the other end of the first connecting piece 371 is connected in series with the energy dissipation member 8 and the third connecting piece 374 in sequence, and the third connecting piece 374 is connected to the negative electrode tab 62 through the negative electrode connecting piece 52, so as to achieve the purpose of communicating the positive electrode tab 61 with the negative electrode tab 62. While the positive tab 61 and the negative tab 62 are connected, the instantaneous current can fuse the fuse 35, thereby disconnecting the positive tab 61 from the positive connection assembly. Meanwhile, the energy consumption piece 8 consumes residual electric energy, so that the whole battery 1 is protected.
In the above embodiment, the temperature deformation spring 372 is adopted to realize the state conversion of the protection device, and the distance between the first connecting piece 371 and the second connecting piece 373 can be adjusted through the arrangement of the pre-pressure of the spring, so that the starting accuracy of the protection device is improved. Further, the temperature deformation spring 372 is only sensitive to temperature changes, and is not affected by other environmental factors in the battery 1.
Alternatively, as shown in fig. 1 to 4, the positive electrode post 32 is a hollow structure, the positive electrode lead-out piece 31 is disposed at the bottom of the hollow structure, and the conductive element 321 is disposed at the top of the hollow structure; the fuse 35, the support 375 and the temperature deformation spring 372 are all located in the hollow structure, the fourth connecting piece 36 is connected with the conductive element 321, and the energy dissipation element 8 is embedded on the housing.
Specifically, in this embodiment, the fuse 35, the support 375 and the temperature deformation spring 372 are all located in the hollow structure, so that each part can be protected from external environmental factors. In addition, since the positive electrode post 32 is exposed to the casing, the occupation of the internal space of the battery 1 is avoided, and the capacity of the battery 1 is not affected while the protection of the battery 1 is realized. The top of the positive electrode post 32 is a conductive element 321, the periphery and the bottom can be made of insulating materials, and the positive electrode connecting piece 51 passes through the shell to be exposed at the bottom of the positive electrode post 32 and is connected with the positive electrode leading-out piece 31.
Further, the energy dissipation member 8 is embedded on the housing, so that not only can the space inside the battery 1 be saved, but also the energy dissipation member 8 can be protected. It should be noted that the casing of the battery 1 is usually an aluminum casing, and an insulation design is required between the energy dissipation member 8 and the casing. At the same time, the first connecting piece 371 and the third connecting piece 374 also require insulation treatment with the housing.
In the above embodiments, the first connecting piece 371, the second connecting piece 373, the third connecting piece 374 and the fourth connecting piece 36 are made of conductive materials, which may be conductive wires or conductive structures, and specifically may be designed according to the shape of the battery 1 and the space in which each connecting piece is located, which is not limited in the present utility model.
Alternatively, as shown in fig. 3 to 4, the support 375 is formed with a guide groove, and the temperature deformation spring 372 is fixed in the guide groove so that the second connection piece 373 can move along the guide groove.
Specifically, in this embodiment, the design of the guiding groove makes the movement of the second connecting piece 373 have a certain constraint, so that it can be in contact connection with the first connecting piece 371 after the deformation of the temperature deformation spring 372, thereby improving the accuracy of starting the short circuit element to be converted into a short circuit state.
Optionally, as shown in fig. 1 to 2, the casing includes a casing 2 and a cover plate 3, the casing 2 and the cover plate 3 are buckled to form a sealed cavity, the positive electrode post 32 and the negative electrode post 34 are exposed from the cover plate 3, and the protection device is disposed on the cover plate 3. Wherein, set up protection device on apron 3, be convenient for battery 1 production.
Optionally, as shown in fig. 1 to 2, the structure of the battery 1 further includes an insulating member 7, the insulating member 7 is disposed between the cover plate 3 and the electrode core 4, the positive tab 61 is connected to the positive connection tab 51 through the insulating member 7, and the negative tab 62 is connected to the negative connection tab 52 through the insulating member 7.
Specifically, in the present embodiment, the insulating member 7 is disposed between the electrode core 4 and the cover plate 3, so that the shorting of the positive electrode tab 61 and the negative electrode tab 62 under normal conditions (the temperature in the cavity is less than the threshold temperature) can be avoided, and the safety of the battery 1 is further improved.
Alternatively, referring to fig. 1 to 4, when the temperature in the cavity is greater than or equal to the threshold temperature, the protection device is in the short-circuit state, the positive tab 61 and the negative tab 62 are communicated, and the negative connection assembly is disconnected from the negative tab 62.
Specifically, in the present embodiment, when the protection device is in the short-circuit state, the purpose of stopping the external operation of the battery 1 may be achieved by disconnecting the negative electrode tab 62 from the negative electrode connection assembly. That is, in some embodiments, the fuse 35 may be connected in series between the negative electrode tab 62 and the negative electrode connection component, and may be specifically designed according to practical requirements, which is not limited by the present utility model.
The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.
While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (10)
1. A battery structure, characterized by comprising:
The battery pack comprises a shell and a pole core, wherein a sealed cavity is formed in the shell, the pole core is arranged in the cavity, and a positive pole lug and a negative pole lug are led out of the pole core;
The positive electrode connecting component and the negative electrode connecting component are respectively at least partially exposed out of the shell;
One end of the protection device is connected with the positive electrode connecting component, the other end of the protection device is connected with the negative electrode connecting component, and the protection device is provided with an open circuit state and a short circuit state;
When the temperature in the cavity is smaller than a threshold value temperature, the protection device is in the open-circuit state, the positive electrode lug and the negative electrode lug are open-circuit, and the positive electrode connecting component and the negative electrode connecting component are respectively communicated with the positive electrode lug and the negative electrode lug;
When the temperature in the cavity is greater than or equal to the threshold temperature, the protection device is in the short circuit state, the positive electrode lug is communicated with the negative electrode lug, and the positive electrode connecting assembly is disconnected with the positive electrode lug.
2. The battery structure of claim 1, wherein the protection device comprises a fuse and an activation shorting assembly;
The fuse is connected in series between the positive electrode connection and the positive electrode lug, one end of the starting short circuit component is communicated with the positive electrode lug, and the other end of the starting short circuit component is communicated with the negative electrode lug;
When the protection device is in the open-circuit state, the fuse is in an unblown state, and the positive electrode connecting component can be communicated with the positive electrode lug through the fuse;
When the protection device is in the short circuit state, the starting short circuit component enables the positive electrode lug to be communicated with the negative electrode lug and enables the fuse to be fused.
3. The battery structure of claim 2, wherein the positive electrode connection assembly comprises a positive electrode connection sheet, a positive electrode lead-out sheet and a positive electrode post, the positive electrode tab, the positive electrode connection sheet, the positive electrode lead-out sheet, the fuse and the positive electrode post are sequentially connected in series, the positive electrode post is exposed out of the housing, and one end of the start-up short circuit assembly is connected between the fuse and the positive electrode lead-out sheet;
the negative electrode connecting assembly comprises a negative electrode connecting sheet, a negative electrode leading-out sheet and a negative electrode column, wherein the negative electrode lug, the negative electrode connecting sheet, the negative electrode leading-out sheet and the negative electrode column are sequentially connected, the negative electrode column is exposed out of the shell, and the other end of the starting short circuit assembly is connected with the negative electrode connecting sheet.
4. The battery structure of claim 3, further comprising a power dissipation member connected in series between the positive tab and the negative tab when the protection device is in the short circuit state, the power dissipation member being a resistive element.
5. The battery structure of claim 4, wherein the start-up shorting assembly comprises a support, a temperature deformation spring, and a second tab;
The second connecting piece is movably connected to the supporting piece through the temperature deformation spring, the supporting piece is fixedly connected to the positive electrode leading-out piece, one end of the energy consumption piece is connected with the negative electrode connecting piece through a third connecting piece, and the other end of the energy consumption piece is connected with the first connecting piece;
When the protection device is in the open-circuit state, one end of the fuse is connected with the positive pole through a fourth connecting sheet, the other end of the fuse is connected with the positive pole leading-out sheet through the supporting piece, and the free end of the first connecting sheet is positioned near the second connecting sheet;
When the protection device is in the short circuit state, the temperature deformation spring is in an extending state, so that the second connecting piece moves to be in contact connection with the first connecting piece, the positive electrode lug is communicated with the negative electrode lug, and the fuse is fused.
6. The battery structure of claim 5, wherein the positive electrode post is a hollow structure, the positive electrode lead-out tab is disposed at the bottom of the hollow structure, and a conductive element is disposed at the top of the hollow structure;
The fuse, the supporting piece and the temperature deformation spring are all located in the hollow structure, the fourth connecting piece is connected with the conductive element, and the energy dissipation piece is embedded on the shell.
7. The battery structure according to claim 6, wherein a guide groove is formed on the support member, and the temperature deformation spring is fixed in the guide groove so that the second connection piece can move along the guide groove.
8. The battery structure of claim 4, wherein the housing comprises a shell and a cover plate, the shell and the cover plate are buckled to form the sealed cavity, the positive electrode post and the negative electrode post are exposed out of the cover plate, and the protection device is arranged on the cover plate.
9. The battery structure of claim 8, further comprising an insulator disposed between the cover plate and the pole core, the positive tab passing through the insulator and being connected to the positive connection tab, and the negative tab passing through the insulator and being connected to the negative connection tab.
10. The battery structure according to claim 1, wherein the protection device is in the short-circuit state when the temperature in the cavity is greater than or equal to the threshold temperature, the positive electrode tab and the negative electrode tab are in communication, and the negative electrode connection assembly is disconnected from the negative electrode tab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420298231.4U CN222015636U (en) | 2024-02-18 | 2024-02-18 | Battery structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420298231.4U CN222015636U (en) | 2024-02-18 | 2024-02-18 | Battery structure |
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| CN222015636U true CN222015636U (en) | 2024-11-15 |
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| CN202420298231.4U Active CN222015636U (en) | 2024-02-18 | 2024-02-18 | Battery structure |
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| CN (1) | CN222015636U (en) |
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