CN113394518A - Battery module - Google Patents
Battery module Download PDFInfo
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- CN113394518A CN113394518A CN202110493284.2A CN202110493284A CN113394518A CN 113394518 A CN113394518 A CN 113394518A CN 202110493284 A CN202110493284 A CN 202110493284A CN 113394518 A CN113394518 A CN 113394518A
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- heating resistor
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- resistor
- heat
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- 238000010438 heat treatment Methods 0.000 claims abstract description 139
- 238000012423 maintenance Methods 0.000 claims description 58
- 230000001681 protective effect Effects 0.000 claims description 26
- 230000006835 compression Effects 0.000 claims description 25
- 238000007906 compression Methods 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 claims description 5
- 238000004880 explosion Methods 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 4
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 32
- 230000000694 effects Effects 0.000 description 7
- 239000004576 sand Substances 0.000 description 4
- 230000009365 direct transmission Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to the field of battery modules, and provides a battery module which comprises at least two bus bars, at least one heating resistor connected between two adjacent bus bars, and at least two safety structures electrically connected between the heating resistor and the bus bars. When the current flowing through the heating resistor is too large, the safety structure can be fused by the heating resistor, so that the mechanical connection relation and the electrical connection relation between the heating resistor and the bus bar are relatively and immediately broken, the overcurrent phenomenon is relatively and immediately interrupted, heat accumulation is prevented, the risks of explosion, fire and the like of the battery module are reduced, and the safety performance of the battery module can be improved. And through supplementing the welding insurance structure between heating resistor and busbar, still can guarantee the security performance of battery module again to used repeatedly this battery module.
Description
Technical Field
The invention belongs to the technical field of battery modules, and particularly relates to a battery module.
Background
The battery module sets up insurance structure in its positive negative pole derivation department usually, and insurance structure can fuse in order to hinder thermal runaway to stretch when electric core is unusual to ensure battery module's security performance. However, the existing safety structure is easily broken when the positive electrode and the negative electrode of the battery module are locked, so that the reliability is poor, and the safety performance of the battery module is influenced; and the safety structure is scrapped after being fused or pulled apart, so that the scrapping risk of the battery module is high, and the service performance and the service life are poor.
Disclosure of Invention
The embodiment of the invention aims to provide a battery module to solve the technical problems that the safety structure of the existing battery module is easily broken when the positive electrode and the negative electrode of the module are locked and is scrapped after being fused or broken.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a battery module, includes two at least busbar, at least one connect in the heating resistor between two adjacent busbar to and two at least electricity connect in the insurance structure between heating resistor and the busbar, when the temperature of heating resistor is higher than the melting point temperature of insurance structure, the insurance structure can melt, and makes heating resistor and busbar disconnection.
By adopting the scheme, the fuse structure can be kept in a crystalline state and a current path along the bus bar, the fuse structure, the heating resistor, the other fuse structure and the other bus bar can be kept in the normal use process of the battery module; and when the battery module used unusually and the electric current that flows through heating resistor was too big, give off heat and temperature through heating resistor to make insurance structure melting, based on this, can make heating resistor and busbar disconnection mechanical connection relation and electrical connection relation in time reliably and relatively promptly through fused insurance structure, thereby can reliably and relatively interrupt the overcurrent phenomenon in time, hinder the heat and pile up, reduce the risk that battery module took place to explode, the condition such as catching fire, thereby can ensure and improve battery module's security performance.
Through adopting above-mentioned scheme, still can be when repairing battery module, through supply welding insurance structure between heating resistor and busbar, and make the busbar, insurance structure, heating resistor, another insurance structure, another busbar has rebuild mechanical connection relation and electric connection relation, the maintenance convenience is higher, and be convenient for reuse the battery module after the maintenance, the security performance of the battery module after the maintenance can be ensured by heating resistor and new insurance structure again, thereby do benefit to the condemned risk that reduces battery module, do benefit to improving battery module's performance, do benefit to the life of extension battery module.
In one embodiment, the securing structure is solder.
Through adopting above-mentioned scheme, can be so that insurance structure's melting point is lower relatively, based on this, can be when the battery module uses unusually and the electric current that flows through heating resistor is too big, make insurance structure can melt in time relatively under heating resistor's heat influence, thereby can reliably and break the mechanical connection relation and the electric connection relation between development thermal resistor and the busbar in time relatively, can reliably and break off the overcurrent phenomenon in time relatively, hinder the heat and pile up, thereby can further reduce the risk that battery module explodes, the condition such as the fire, can further improve battery module's security performance.
In one embodiment, the heat generating resistor is a high temperature resistant metal.
Through adopting above-mentioned scheme, the resistance that generates heat adopts high temperature resistant metal to make, and the resistance that generates heat has electric conductive property, heating performance and high temperature resistance, based on this, can do benefit to and improve the durability and the reliability of resistance that generates heat to can ensure and improve resistance's performance that generates heat, guarantee and prolong resistance that generates heat's life.
In one embodiment, the battery module further comprises a tab support for fixing the bus bar, and an elastic member elastically abutted between the tab support and the heating resistor.
By adopting the scheme, when the safety structure is not melted and the heating resistor is fixed relative to the bus bar, the elastic piece is elastically abutted between the lug support and the heating resistor, and the elastic piece generates compression elastic deformation and stores elastic force; and when the current that flows through the heating resistor is too big, the heating resistor makes the fuse structure melt basically, the elasticity of elastic component can impel the heating resistor to break off mechanical connection relation and the electric connection relation with the busbar towards the direction of keeping away from utmost point ear support fast to can break off the overcurrent phenomenon more reliably, more immediately, hinder the heat and pile up, thereby can further reduce the risk that battery module takes place the circumstances such as explosion, fire, can further improve battery module's security performance.
In one embodiment, both ends of the elastic element are fixedly connected with the tab support and the heating resistor respectively.
Through adopting above-mentioned scheme, the one end of elastic component will with utmost point ear support fixed connection, based on this, make the heating resistor towards the direction of keeping away from utmost point ear support fast with busbar disconnection mechanical connection relation and electric connection relation after at the elasticity of elastic component, the elastic component will not deviate from utmost point ear support and other regions to the battery module that do not scatter to can be when repairing the battery module, the quick reset of the elastic component of being convenient for does benefit to the maintenance convenience that improves the battery module.
In a similar way, through adopting above-mentioned scheme, the other end of elastic component will with heating resistor fixed connection, based on this, make heating resistor towards the direction of keeping away from utmost point ear support quick with busbar disconnection mechanical connection relation and electric connection relation after at the elasticity of elastic component, heating resistor will not also deviate from the elastic component and other regions to the battery module that do not scatter to can be when repairing the battery module, the quick reset of the heating resistor of being convenient for does benefit to the maintenance convenience that further improves the battery module.
In one embodiment, the resilient member is a compression spring.
By adopting the scheme, the elastic piece can bear axial pressure, and can store enough deformation energy through compression deformation, namely enough elasticity, so that the use performance of the elastic piece can be ensured and improved, and the use reliability of the elastic piece can be improved.
In one embodiment, the tab support is provided with a sleeve post protruding towards the heating resistor, and the sleeve post is used for sleeve connection of the compression spring.
By adopting the scheme, the lug support can be convexly provided with the sleeving column towards one side of the heating resistor at the arrangement position corresponding to the compression spring so as to limit the sleeving of the compression spring, and on the basis, on one hand, the deformation direction of the compression spring can be guided through the sleeving column, so that the compression spring can be guided to generate elastic force which is applied towards the direction far away from the lug support, and the heating resistor is enabled to be rapidly disconnected from the mechanical connection relation and the electrical connection relation with the bus bar; on the other hand, the compression spring is sleeved in a limiting mode through the sleeving connection column, so that the assembly convenience of the compression spring can be improved, the compression spring can be conveniently reset, and the maintenance convenience of the battery module can be improved to a certain extent.
In one embodiment, the elastic element elastically abuts against the middle part of the heating resistor.
Through adopting above-mentioned scheme, can make the elasticity of elastic component act on the middle part of heating resistor relatively, based on this, the electric current that flows through heating resistor is too big, heating resistor makes the fused basically of insurance structure, the elasticity of elastic component can impel heating resistor's both ends, relatively balanced ground is towards the direction of keeping away from utmost point ear support fast with busbar disconnection mechanical connection relation and electrical connection relation, thereby can break off the overcurrent phenomenon more reliably, more immediately, hinder the heat and pile up, thereby can further reduce the risk that battery module explodes, the condition such as fire, can further improve battery module's security performance.
In one embodiment, the safety structure and the heating resistor are arranged in the area where the bus bar avoids the lug.
Through adopting above-mentioned scheme, can make insurance structure and heating resistor dodge utmost point ear setting, based on this, can effectively reduce the especially heating resistor's of insurance structure heat by the direct transmission to utmost point ear and then transmit the risk to electric core unit to can help reducing the especially heating resistor's of insurance structure heat to electric core unit's negative effects, thereby do benefit to the performance of guarantee electric core unit, do benefit to the performance of guarantee battery module, do benefit to the life of extension battery module.
In one embodiment, the fuse structure and the heat-generating resistor are disposed at the ends of the bus bars relatively distant from the tabs.
Through adopting above-mentioned scheme, can make insurance structure and heating resistor keep away from utmost point ear setting relatively, based on this, can further reduce the especially heating resistor's of insurance structure heat by the direct transmission to utmost point ear and then transmit the risk to electric core unit to can further reduce the especially heating resistor's of insurance structure heat to electric core unit's negative effects, thereby do benefit to the performance of guarantee electric core unit, do benefit to the performance of guarantee battery module, do benefit to the life of extension battery module.
In one embodiment, the battery module further includes:
the end plate is arranged on one side of the heating resistor, which is far away from the bus bar, and is provided with a maintenance port opposite to the heating resistor;
the protective cover is detachably connected to the maintenance opening.
Through adopting above-mentioned scheme, when maintenance personal only need reprocess insurance structure and heating resistor, the protective cover is opened to the maintenance personal accessible, and via maintenance mouth supplementary welding insurance structure between heating resistor and busbar to make busbar, insurance structure, heating resistor, another insurance structure, another busbar rebuild mechanical connection relation and electric connection relation, only need close the maintenance mouth again with the protective cover afterwards, can accomplish the maintenance. Therefore, through adopting above-mentioned scheme, can make the holistic maintenance convenience of battery module higher, the security performance of the battery module after the maintenance can also be ensured by heating resistor and new insurance structure again to the used repeatedly of the battery module of being convenient for does benefit to the condemned risk that reduces battery module, does benefit to the performance that improves battery module, does benefit to the life of extension battery module.
In one embodiment, a plurality of convex strips are convexly arranged on one side of the end plate away from the heating resistor, the convex strips are criss-cross to form a plurality of uniformly distributed unit cells, and the maintenance opening is arranged in the unit cells.
By adopting the scheme, the maintenance opening can be avoided from each convex strip, and on the basis, on one hand, the processing and forming of the maintenance opening can be facilitated; on the other hand, can reduce the negative effects of the setting of maintenance mouth to the intensity of end plate to can ensure and improve the performance of end plate, ensure and prolong the life of end plate, and then do benefit to the life of extension battery module.
In one embodiment, the end plate is provided with a plurality of protruding strips which are criss-cross at one side far away from the heating resistor, and the protective cover is provided with a limiting structure which can be in limiting fit with part of the protruding strips at one side close to the end plate.
Through adopting above-mentioned scheme, accessible limit structure and the spacing cooperation of each sand grip of maintenance mouth week side, and make the protective cover for end plate rigidity, based on this, can make the protective cover realize fast with the counterpoint of end plate and maintenance mouth, thereby can ensure and improve the assembly convenience of protective cover, and still can make the protective cover can realize covering the maintenance mouth relatively comprehensively, thereby can ensure and improve the protective effect of protective cover to the maintenance mouth, can ensure the safety in utilization and the use reliability of battery module.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic perspective view of a battery module according to an embodiment of the invention;
fig. 2 is an exploded view of the battery module provided in fig. 1;
fig. 3 is a schematic view of a partial structure of a battery module according to an embodiment of the invention;
FIG. 4 is an enlarged view of area A provided in FIG. 3;
fig. 5 is a perspective view of a protective cover according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
100-a busbar; 200-heating resistance; 300-a safety structure; 400-pole lug support, 410-sleeve connection column, 401-through hole; 500-an elastic member; 600-end plate, -service opening, -rib; 700-protective cover, 701-limit structure, 7011-limit groove; 800-cell unit, 810-tab.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes a specific implementation of the present invention in more detail with reference to specific embodiments:
referring to fig. 2, 3 and 4, an embodiment of the invention provides a battery module, which includes at least two bus bars 100, at least one heating resistor 200 connected between two adjacent bus bars 100, and at least two safety structures 300 electrically connected between the heating resistor 200 and the bus bars 100, wherein when a temperature of the heating resistor 200 is higher than a melting point temperature of the safety structures 300, the safety structures 300 can be melted, and the heating resistor 200 is disconnected from the bus bars 100.
What need to explain at first, the battery module includes a plurality of battery cell units 800 of arranging along its thickness direction a range upon range of, locate the utmost point ear support 400 of battery cell unit 800 tip department on length direction b to and be fixed in utmost point ear support 400 and deviate from at least one busbar 100 of battery cell unit 800 one side, be equipped with a plurality of cross-under holes 401 on the utmost point ear support 400, the utmost point ear 810 of battery cell unit 800 can pass and locate cross-under holes 401 and welded to on the busbar 100. Based on the connection relationship between the tabs 810 and the bus bar 100, the corresponding battery cell units 800 establish an electrical connection relationship with the bus bar 100. And because each battery cell unit 800, tab holder 400 and each busbar 100 fixed on the tab holder 400 are in a relatively fixed state, the stability and reliability of the electrical connection relationship established between the corresponding battery cell unit 800 and the busbar 100 can be ensured and improved.
It should be noted that, according to the design requirement of the battery module, at least one heat-generating resistor 200 may be provided, and the number of the safety structures 300 is equal to twice the number of the heat-generating resistors 200. When the two opposite ends of the heating resistor 200 are connected to the two adjacent busbars 100 through the fuse structure 300, the fuse structure 300 in a crystalline state (i.e., a solidified state) can fix the heating resistor 200 with respect to the busbars 100, and form a current path along the busbars 100, the fuse structure 300, the heating resistor 200, the other fuse structure 300, and the other busbar 100, that is, an electrical connection relationship is established between the two adjacent busbars 100.
Based on the above structure, in the normal use process of the battery module, the current flowing through the heating resistor 200 will be relatively small, and then the heat generation amount of the heating resistor 200 will also be relatively small, at this time, the heat generation amount of the heating resistor 200 will not melt the fuse structure 300, and the current path along the bus bar 100, the fuse structure 300, the heating resistor 200, the other fuse structure 300, and the other bus bar 100 is kept smooth.
On the contrary, when the current flowing through the heating resistor 200 is too large due to abnormal use of the battery module, the heat generation amount of the heating resistor 200 is gradually increased, the temperature of the heating resistor 200 is also gradually increased, and when the temperature of the heating resistor 200 is higher than the melting point temperature of the fuse structure 300, the fuse structure 300 is melted by the heating resistor 200, and the fused fuse structure 300 can reliably and relatively instantly disconnect the mechanical connection relationship and the electrical connection relationship between the heating resistor 200 and the bus bar 100. Thereby can reliably and relatively interrupt the overcurrent phenomenon in time, hinder the heat and pile up, reduce the risk that battery module takes place the circumstances such as explosion, fire to can ensure and improve battery module's security performance.
When the battery module is interrupted and repaired, a maintenance worker can repair and overcome other problems of the battery module, and simultaneously, the bus bar 100, the safety structure 300, the heating resistor 200, the other safety structure 300 and the other bus bar 100 can rebuild a mechanical connection relation and an electrical connection relation by supplementing the welding safety structure 300 between the heating resistor 200 and the bus bar 100, so that the maintenance convenience is high, the maintained battery module can be reused, and the safety performance of the maintained battery module can be guaranteed again by the heating resistor 200 and the new safety structure 300, thereby being beneficial to reducing the rejection risk of the battery module, improving the service performance of the battery module and prolonging the service life of the battery module.
In summary, by adopting the above scheme, the fuse structure 300 can maintain a crystalline state and maintain a current path along the bus 100, the fuse structure 300, the heating resistor 200, the other fuse structure 300, and the other bus 100 during the normal use of the battery module; when the battery module is abnormally used and the current flowing through the heating resistor 200 is too large, the heating resistor 200 emits heat and temperature to melt the safety structure 300, so that the heating resistor 200 and the bus bar 100 can be disconnected from the mechanical connection relation and the electrical connection relation in real time reliably and relatively through the melted safety structure 300, the overcurrent phenomenon can be interrupted in real time reliably and relatively, heat accumulation is prevented, risks of explosion, fire and the like of the battery module are reduced, and the safety performance of the battery module can be guaranteed and improved.
Through adopting above-mentioned scheme, still can be when repairing battery module, through supplementary welding insurance structure 300 between heating resistor 200 and busbar 100, and make busbar 100, insurance structure 300, heating resistor 200, another insurance structure 300, another busbar 100 has rebuild mechanical connection relation and electric connection relation, the maintenance convenience is higher, and be convenient for reuse the battery module after the maintenance, the security performance of the battery module after the maintenance can be ensured again by heating resistor 200 and new insurance structure 300, thereby do benefit to and reduce the condemned risk of battery module, do benefit to the performance that improves battery module, do benefit to the life of extension battery module.
Referring to fig. 3 and 4, in the present embodiment, the fuse structure 300 is solder.
By adopting the above scheme, can make the fusing point of insurance structure 300 lower relatively, based on this, can be when the battery module uses unusually and the electric current that flows through heating resistor 200 is too big, make insurance structure 300 can melt relatively promptly under the heat influence of heating resistor 200, thereby can reliably and relatively promptly break off the mechanical connection relation and the electrical connection relation between development heating resistor 200 and busbar 100, can reliably and relatively promptly interrupt the overcurrent phenomenon, hinder the heat and pile up, thereby can further reduce the risk that the battery module takes place to explode, the condition such as strike sparks, can further improve the security performance of battery module.
In addition, the scheme is adopted, so that the cost is reduced.
Of course, in other possible embodiments, the securing structure 300 may be other solders, such as solders containing silver.
Referring to fig. 2, fig. 3 and fig. 4, in the present embodiment, the heating resistor 200 is made of high temperature resistant metal.
By adopting the above scheme, the heating resistor 200 is made of high-temperature-resistant metal, and the heating resistor 200 has the conductivity, the heating performance and the high-temperature-resistant performance, so that the durability and the reliability of the heating resistor 200 can be favorably improved, the use performance of the heating resistor 200 can be ensured and improved, and the service life of the heating resistor 200 can be ensured and prolonged.
Illustratively, the heat-generating resistor 200 is made of tungsten.
Referring to fig. 3 and 4, in the present embodiment, the battery module further includes a tab bracket 400 for fixing the bus bar 100, and an elastic member 500 elastically abutted between the tab bracket 400 and the heating resistor 200.
By adopting the above scheme, when the safety structure 300 is not melted and the heating resistor 200 is fixed relative to the bus bar 100, the elastic member 500 is elastically abutted between the tab support 400 and the heating resistor 200, and the elastic member 500 is elastically deformed by compression during the process and stores elastic force; while the current flowing through the heating resistor 200 is too large and the safety structure 300 is fused by the heating resistor 200, the elastic force of the elastic member 500 may cause the heating resistor 200 to be rapidly disconnected from the mechanical connection relationship and the electrical connection relationship with the bus bar 100 in the direction away from the tab holder 400, so that the overcurrent phenomenon may be more reliably and more immediately interrupted and the heat accumulation may be hindered, thereby further reducing the risk of the battery module in the situations of explosion, fire, etc., and further improving the safety performance of the battery module.
Referring to fig. 3 and 4, in the present embodiment, two ends of the elastic element 500 are respectively fixedly connected to the tab support 400 and the heating resistor 200.
Through adopting above-mentioned scheme, the one end of elastic component 500 will with utmost point ear support 400 fixed connection, based on this, make the resistance 200 that generates heat after keeping away from utmost point ear support 400's direction fast and busbar 100 disconnection mechanical connection relation and the electrical connection relation at elastic component 500's elasticity, elastic component 500 will not deviate from utmost point ear support 400 and other regions to the battery module are not scattered, thereby can be when repairing the battery module, the quick reset of the elastic component 500 of being convenient for, do benefit to the maintenance convenience that improves the battery module.
In a similar way, through adopting above-mentioned scheme, the other end of elastic component 500 will with heating resistor 200 fixed connection, based on this, make heating resistor 200 towards keeping away from behind the quick and busbar 100 disconnection mechanical connection relation and the electrical connection relation of direction of utmost point ear support 400 at elastic component 500's elasticity, heating resistor 200 will also not deviate from elastic component 500 and other regions to the battery module are not scattered, thereby can be when repairing the battery module, the quick reset of heating resistor 200 of being convenient for, do benefit to the maintenance convenience that further improves the battery module.
Referring to fig. 3 and 4, in the present embodiment, the elastic element 500 is a compression spring.
By adopting the above scheme, the elastic member 500 can bear axial pressure, and store sufficient deformation energy, that is, sufficient elastic force, through compression deformation, thereby ensuring and improving the service performance of the elastic member 500, and improving the service reliability of the elastic member 500.
Referring to fig. 3 and 4, in the present embodiment, the tab holder 400 is provided with a socket post 410 protruding toward the heating resistor 200, and the socket post 410 is used for socket-connecting a compression spring. The number of the hitching legs 410 is equal to the number of the compression springs.
By adopting the above scheme, the tab support 400 can be convexly provided with the sleeve connection column 410 towards one side of the heating resistor 200 at the position corresponding to the arrangement position of the compression spring so as to limit the sleeve connection of the compression spring, on the basis, on one hand, the deformation direction of the compression spring can be guided by the sleeve connection column 410, so that the compression spring can be guided to generate elastic force which is applied towards the direction away from the tab support 400, and the heating resistor 200 can be rapidly disconnected from the mechanical connection relation and the electrical connection relation with the busbar 100; on the other hand, the compression spring is sleeved in a limiting manner through the sleeving connection column 410, so that the assembly convenience of the compression spring can be improved, the resetting of the compression spring can be facilitated, and the maintenance convenience of the battery module can be improved to a certain extent.
Referring to fig. 3 and 4, in the present embodiment, the elastic element 500 elastically abuts against the middle portion of the heating resistor 200.
By adopting the above scheme, the elastic force of the elastic member 500 relatively acts on the middle part of the heating resistor 200, on the basis, when the current flowing through the heating resistor 200 is too large, the heating resistor 200 melts the safety structure 300, the elastic force of the elastic member 500 can enable the two ends of the heating resistor 200 to break the mechanical connection relation and the electrical connection relation with the busbar 100 relatively and uniformly in the direction away from the tab support 400, so that the overcurrent phenomenon can be interrupted more reliably and more immediately, the heat accumulation is prevented, the risks of explosion, fire and other conditions of the battery module can be further reduced, and the safety performance of the battery module can be further improved.
Referring to fig. 2, fig. 3 and fig. 4, in the present embodiment, the safety structure 300 and the heating resistor 200 are disposed in the bus bar 100 in a region that is free from the tab 810.
It should be noted that the tab 810 of the battery cell unit 800 is inserted through the through hole 401 of the tab holder 400 and is bent and welded to the bus bar 100 fixed to the tab holder 400, so as to establish a stable and reliable electrical connection relationship with the bus bar 100. Based on this, in this embodiment, the safety structure 300 and the heating resistor 200 are disposed in the region where the busbar 100 avoids the tab 810, so as to effectively reduce the risk that the heat dissipated by the heating resistor 200 is directly transferred to the tab 810 and then transferred to the battery cell unit 800, thereby being helpful to reduce the negative effect of the heat generated by the heating resistor 200 on the battery cell unit 800.
Therefore, through adopting above-mentioned scheme, can make insurance structure 300 and heating resistor 200 dodge utmost point ear 810 setting, based on this, can effectively reduce insurance structure 300 especially heating resistor 200's heat and by direct transmission to utmost point ear 810 and then transmit the risk to electric core unit 800, thereby can help reducing insurance structure 300 especially heating resistor 200's heat to electric core unit 800's negative effects, thereby do benefit to the performance of guarantee electric core unit 800, do benefit to the performance of guarantee battery module, do benefit to the life of extension battery module.
Referring to fig. 2, 3 and 4, in the present embodiment, the fuse structure 300 and the heat-generating resistor 200 are disposed at the end of the bus bar 100 relatively far from the tab 810.
It should be noted that the bus bar 100 has opposite top and bottom ends, and the safety structure 300 and the heat-generating resistor 200 may be disposed at the top or bottom end of the bus bar 100 relatively far from the tab 810, preferably at the bottom end.
Based on this, through adopting above-mentioned scheme, can make insurance structure 300 and heating resistor 200 keep away from utmost point ear 810 setting relatively, based on this, can further reduce insurance structure 300 especially heating resistor 200's heat and directly transmitted to utmost point ear 810 and then transmit the risk on electric core unit 800, thereby can further reduce insurance structure 300 especially heating resistor 200's heat and to electric core unit 800's negative effects, thereby do benefit to guarantee electric core unit 800's performance, do benefit to the performance of guarantee battery module, do benefit to the life of extension battery module.
Referring to fig. 1 and 2, in the present embodiment, the battery module further includes an end plate 600 and a protective cover 700, the end plate 600 is disposed on a side of the heating resistor 200 away from the bus bar 100, and the end plate 600 is disposed with a maintenance opening opposite to the heating resistor 200; the shield cover 700 is removably attached to the service port.
It should be noted that, along the length direction b of the battery cell unit 800, and on the side of the heating resistor 200 away from the bus bar 100, the battery module is further provided with the end plate 600, and the arrangement of the end plate 600 can make the whole framework of the battery module be regular and compact, thereby facilitating the improvement of the volume utilization rate and the mass grouping rate of the battery module. Wherein the end plate 600 is insulated with respect to the heat generating resistor 200 and the bus bar 100.
Here, the maintenance port in the end plate 600 is provided so as to penetrate the end plate 600, and the maintenance port is provided so as to face the heat generating resistor 200 in the longitudinal direction b of the cell unit 800.
By adopting the above scheme, when the maintenance personnel only need to repair the insurance structure 300 and the heating resistor 200, the maintenance personnel can open the protective cover 700, and additionally weld the insurance structure 300 between the heating resistor 200 and the busbar 100 through the maintenance opening, and make the busbar 100, the insurance structure 300, the heating resistor 200, another insurance structure 300 and another busbar 100 reestablish the mechanical connection relation and the electrical connection relation, and then only need to cover the maintenance opening again with the protective cover 700, and the maintenance can be completed. Therefore, through adopting above-mentioned scheme, can make the holistic maintenance convenience of battery module higher, the security performance of the battery module after the maintenance can also be ensured by heating resistor 200 and new insurance structure 300 again to the used repeatedly of the battery module of being convenient for does benefit to the condemned risk that reduces battery module, does benefit to the performance that improves battery module, does benefit to the life who prolongs battery module.
The protective cover 700 covers the maintenance opening completely to seal the maintenance opening relatively and exert the dustproof and protective effects.
Referring to fig. 1 and 2, in the present embodiment, a plurality of protruding strips are protruded from a side of the end plate 600 away from the heating resistor 200, the protruding strips are criss-cross to form a plurality of uniformly distributed cells, and the maintenance openings are disposed in the cells. When a plurality of maintenance ports are provided, each maintenance port may be provided in a different cell.
It should be noted here that, the protruding a plurality of sand grips that are criss-cross that are equipped with of one side that the heating resistor 200 was kept away from to end plate 600, through the setting of each sand grip, can effectively strengthen end plate 600's intensity on the basis of avoiding end plate 600's weight to increase by a wide margin to can ensure and improve end plate 600's performance, prolong end plate 600's life, and then do benefit to the volume utilization ratio, the quality percentage of uniting and the energy density that improve battery module.
Therefore, by adopting the scheme, the maintenance opening can be arranged to avoid the convex strips, and on the basis, on one hand, the processing and forming of the maintenance opening can be facilitated; on the other hand, the negative influence of the setting of maintenance mouth to the intensity of end plate 600 can be reduced to can ensure and improve the performance of end plate 600, ensure and prolong the life of end plate 600, and then do benefit to the life of extension battery module.
Referring to fig. 1, fig. 2, and fig. 5, in the present embodiment, a plurality of criss-cross protruding strips are protruded from a side of the end plate 600 away from the heat-generating resistor 200, and a limiting structure 701 capable of being in limit fit with a portion of the protruding strips is disposed on a side of the protective cover 700 close to the end plate 600.
It should be noted that the limiting structure 701 includes a plurality of limiting grooves 7011, and each of the limiting grooves 7011 crosses vertically and horizontally and corresponds to a part of the convex strips on the periphery of the maintenance opening one by one. When the protective cover 700 covers the maintenance opening, each limit groove 7011 can be in limit fit with each convex strip on the periphery of the maintenance opening one by one.
Therefore, through adopting above-mentioned scheme, accessible limit structure 701 and the spacing cooperation of each sand grip of maintenance opening week side, and make protective cover 700 for end plate 600 rigidity, based on this, can make protective cover 700 realize fast with end plate 600 and maintenance opening's counterpoint, thereby can ensure and improve protective cover 700's assembly convenience, and still can make protective cover 700 realize relatively covering the maintenance opening comprehensively, thereby can ensure and improve protective cover 700 to the protective effect of maintenance opening, can ensure battery module's safety in utilization and use reliability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. The battery module is characterized by comprising at least two bus bars, at least one heating resistor connected between every two adjacent bus bars and at least two safety structures electrically connected between the heating resistor and the bus bars, wherein when the temperature of the heating resistor is higher than the melting point temperature of the safety structures, the safety structures can be melted, and the heating resistor is disconnected from the bus bars.
2. The battery module of claim 1, wherein the fuse structure is solder.
3. The battery module according to claim 1, wherein the heat generating resistor is a high temperature resistant metal.
4. The battery module according to claim 1, further comprising a tab holder for fixing the bus bar, and an elastic member elastically abutting between the tab holder and the heat generating resistor.
5. The battery module according to claim 4, wherein the elastic member is a compression spring.
6. The battery module according to claim 5, wherein the tab holder is provided with a sleeve post protruding toward the heating resistor, and the sleeve post is used for sleeve-jointing the compression spring.
7. The battery module of claim 4, wherein the elastic member elastically abuts against a middle portion of the heating resistor.
8. The battery module according to any one of claims 1 to 7, wherein the securing structure and the heat-generating resistor are provided in the region of the bus bar relief tabs.
9. The battery module according to claim 8, wherein the fuse structure and the heat generating resistor are provided at ends of the bus bars relatively distant from the tabs.
10. The battery module according to any one of claims 1 to 7, further comprising:
the end plate is arranged on one side, far away from the bus bar, of the heating resistor, and is provided with a maintenance opening opposite to the heating resistor;
and the protective cover is detachably connected with the maintenance opening.
11. The battery module according to claim 10, wherein the end plate is provided with a plurality of ribs extending in a crisscross pattern on a side thereof away from the heat-generating resistor, and the protective cover is provided with a limiting structure on a side thereof close to the end plate, the limiting structure being capable of engaging with a portion of the ribs in a limiting manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110493284.2A CN113394518A (en) | 2021-05-07 | 2021-05-07 | Battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110493284.2A CN113394518A (en) | 2021-05-07 | 2021-05-07 | Battery module |
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| CN113394518A true CN113394518A (en) | 2021-09-14 |
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| CN202110493284.2A Pending CN113394518A (en) | 2021-05-07 | 2021-05-07 | Battery module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117525766A (en) * | 2024-01-04 | 2024-02-06 | 上海聚信海聚新能源科技有限公司 | Battery cell module and battery pack |
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