CN111725454B - Battery module and battery pack assembly - Google Patents
Battery module and battery pack assembly Download PDFInfo
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- CN111725454B CN111725454B CN202010535295.8A CN202010535295A CN111725454B CN 111725454 B CN111725454 B CN 111725454B CN 202010535295 A CN202010535295 A CN 202010535295A CN 111725454 B CN111725454 B CN 111725454B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a battery module and a battery pack assembly. The battery module includes the casing, sets up a plurality of electric cores in the casing, the electric link plate and the cover of being connected with electric core and locate the upper cover on a plurality of electric cores, still includes: the thermal protection structure is arranged between the battery cell and the upper cover and is abutted against the battery cell, and comprises a thermal insulation board body, wherein at least one protection thin plate is formed on the thermal insulation board body; each protective thin plate corresponds to an explosion-proof valve of the battery core; the thickness of the protective sheet is smaller than a first set threshold and larger than a second set threshold; the first set threshold value is a maximum thickness value suitable for hot airflow to pass through after the battery core is thermally out of control; the hot air flow passes through the protective thin plate to obtain a depressurized hot air flow, and the second set threshold is a maximum thickness value suitable for the depressurized hot air flow to pass through. The thermal protection structure is arranged to guide the hot air flow sprayed out after the thermal runaway of the battery core to spray out from the protection thin plate, and prevent the hot air flow from returning to other battery cores through other protection thin plates, so that the thermal convection and radiation of the hot air flow to the adjacent battery cores are blocked.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a battery module and a battery pack assembly.
Background
The electric automobile has great potential and advantages in energy conservation and emission reduction, and is increasingly paid more attention to by people. Along with the continuous improvement of the energy density and the quick charging demand of the battery, the energy density of the battery is higher and higher, particularly the popularization and the popularization of the high-activity ternary lithium battery in recent years, and the thermal runaway safety problem of the power battery caused by chain reaction after the abnormal thermal runaway of the power battery is highly concerned by various circles. So, how to design power battery especially battery module, guarantee that electric core can not cause the thermal diffusion chain reaction between electric core to the electric core after out of control, the safety of guaranteeing the vehicle is the problem that each power battery design engineer cared for.
Disclosure of Invention
The invention provides a battery module and a battery pack assembly.A thermal protection structure is arranged between a battery core and an upper cover and is abutted against the battery core, and a protection thin plate is arranged at the position corresponding to the explosion-proof valve of the battery core, so that the thermal runaway of the battery core and the hot air sprayed out after the explosion-proof valve is opened can pass through the protection thin plate, but the pressure of the hot air passing through the protection thin plate is reduced, and the hot air is not enough to return to other battery cores through other protection thin plates, thereby further improving the safety.
The invention provides a battery module, which comprises a shell, a plurality of battery cells arranged in the shell, an electric connection plate connected with the battery cells, and an upper cover covering the plurality of battery cells, and further comprises: the thermal protection structure is arranged between the battery cell and the upper cover and is abutted against the battery cell; the thermal protection structure comprises a thermal insulation board body, wherein the thermal insulation board body is prepared from a thermal insulation material; at least one protective thin plate is formed on the heat insulation plate body; each protective thin plate corresponds to an explosion-proof valve of the battery cell; the thickness of the protective sheet is smaller than a first set threshold value and larger than a second set threshold value; the first set threshold value is a maximum thickness value suitable for hot airflow to pass through after the thermal runaway of the battery core; and the hot airflow after the thermal runaway of the battery core passes through the protective sheet to obtain the hot airflow after the pressure reduction, and the second set threshold value is the maximum thickness value suitable for the hot airflow after the pressure reduction to pass through.
Optionally, the cross-sectional shape and area of the protective sheet are matched with those of the explosion-proof valve of the battery cell, so that the projection of the protective sheet covers the explosion-proof valve.
Optionally, a plurality of sets of through hole pairs are formed in the heat insulation plate body, each through hole pair comprises a first through hole and a second through hole which are oppositely arranged, and the first through hole and the second through hole are respectively used for penetrating through the electrode of the battery core.
Optionally, the electrical connection plate is connected to the electrodes of the battery cells passing through the through hole pairs, and the electrical connection plate is covered with a heat insulation pad.
Optionally, a plurality of first protection grooves are formed in the first surface of the heat insulation plate body; the groove bottom of each first protection groove is used as the protection thin plate.
Optionally, a plurality of second protection grooves are formed in the first surface of the heat insulation plate body corresponding to the positions of the explosion-proof valves; a plurality of third protection grooves are formed in the second surface of the heat insulation plate body, and each third protection groove is arranged opposite to one second protection groove; and the joint of the second protection groove and the third protection groove is used as the protection thin plate.
Optionally, a gap is provided between the thermal protection structure and the upper cover; a gap is arranged between the shell and the upper cover.
Optionally, a heat insulation sheet is arranged between the adjacent electric cores.
The invention also provides a battery pack assembly which comprises an assembly shell and a plurality of battery modules arranged in the assembly shell.
Optionally, the battery pack assembly further comprises: at least one main explosion-proof valve, at least one main explosion-proof valve set in one side surface of the main casing.
By adopting the battery module and the battery pack assembly, the thermal protection structure is arranged between the battery core and the upper cover and is abutted against the battery core, the protection thin plate is arranged at the position of the thermal protection structure corresponding to the explosion-proof valve of the battery core, the thermal runaway of the battery core is guided, the sprayed hot air after the explosion-proof valve is opened is sprayed out from the protection thin plate, the sprayed hot air is prevented from flowing through other protection thin plates and returning to other battery cores, and the thermal convection and radiation of the hot air sprayed out of the thermal runaway battery core to the adjacent battery core are blocked.
Drawings
Fig. 1 is an exploded view illustrating an installation of a thermal protection structure and a battery module according to an embodiment of the present invention;
FIG. 2 is a schematic view of the thermal protection structure of FIG. 1;
FIG. 3 isbase:Sub>A cross-sectional view of the thermal protection structure of FIG. 2 at A-A';
FIG. 4 is an enlarged partial view ofbase:Sub>A cross-sectional view A-A' of the heat shield structure of FIG. 3;
fig. 5 is an exploded view illustrating the installation of a thermal protection structure and a battery module according to another embodiment of the present invention.
Reference numerals:
1: a housing; 2: an electric core; 3: an upper cover; 4: a thermal protection structure; 5: a heat insulation board body; 6: a protective sheet; 7: an explosion-proof valve; 8: a first through hole; 9: a second through hole; 10: an electrode; 11: an electrical connection plate; 12: a heat insulating pad.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Fig. 1 is an exploded view illustrating an installation of a thermal protection structure and a battery module according to an embodiment of the present invention; FIG. 2 is a schematic view of the thermal protection structure of FIG. 1; FIG. 3 isbase:Sub>A cross-sectional view of the thermal protection structure of FIG. 2 at A-A'; fig. 4 isbase:Sub>A partially enlarged view ofbase:Sub>A cross-sectional view of the thermal protection structure of fig. 3 atbase:Sub>A-base:Sub>A', and fig. 5 is an exploded view of the installation of the thermal protection structure andbase:Sub>A battery module according to another embodiment of the present invention.
As shown in fig. 1 to 5, the battery module provided by the present invention includes a casing 1, a plurality of battery cells 2 disposed in the casing 1, an electrical connection board 11 connected to the battery cells 2, and an upper cover 3 covering the plurality of battery cells 2, and further includes: the thermal protection structure 4 is arranged between the battery cell 2 and the upper cover 3 and is abutted against the battery cell 2; the heat protection structure 4 comprises a heat insulation board body 5, wherein the heat insulation board body 5 is made of heat insulation materials; at least one protective thin plate 6 is formed on the heat insulation plate body 5; each protective thin plate 6 corresponds to an explosion-proof valve 7 of the battery cell 2; the thickness of the protective thin plate 6 is smaller than a first set threshold value and larger than a second set threshold value; the first set threshold is a maximum thickness value suitable for hot airflow to pass through after the electric core 2 is out of control due to heat; and the hot airflow after the thermal runaway of the battery core 2 passes through the protective sheet 6 to obtain the hot airflow after the pressure reduction, and the second set threshold is the maximum thickness value suitable for the hot airflow after the pressure reduction to pass through. Through set up on electric core 2 thermal protection structure 4, and thermal protection structure 4 corresponds explosion-proof valve 7 department of electric core 2 sets up protection sheet metal 6, guide electric core 2 thermal runaway and explosion-proof valve 7 open the back spun hot gas stream follow protection sheet metal 6 department blowout to prevent spun hot gas stream from flowing through other protection sheet metal 6 returns to other electric core 2, has blocked thermal convection and the radiation of thermal runaway electric core spun hot gas stream to adjacent electric core 2.
In this embodiment, casing 1 is the rectangular chamber that holds for the cross section, sixteen square electric cores 2 place side by side in casing 1, upper cover 3 set up to with the cuboid plate body that casing 1 size matches, every electric core 2 orientation the relative both ends of a side surface of upper cover 3 all are provided with the electrode 10 of electric core 2, every electric core 2 two the intermediate position of electrode 10 all is provided with explosion-proof valve 7, every explosion-proof valve 7's cross sectional shape all sets up to middle rectangle, and the both ends of rectangle length direction are mirror symmetry's semicircular structure, heat protection structure 4 is the cuboid plate body, and with electric core 2 butt, accessible upper cover 3 compresses tightly or pastes the mode such as realize heat protection structure 4's is fixed, just correspond every on heat insulating board body 5 of heat protection structure 4 the position department of valve 7 all is provided with protection sheet 6, protection sheet 6's cross sectional shape and size with explosion-proof valve 7's cross sectional shape and size are the same, in fig. 1 and 5 protection sheet 6's structure is the same, and the orientation is opposite. According to different brands and specifications of the battery core, the first set threshold value and the second set threshold value of the thickness of the protective thin plate 6 are obtained through experiments, so that hot air which is sprayed out after the battery core 2 is out of thermal control and the explosion-proof valve 7 is opened can pass through the protective thin plate 6 but cannot pass back to other parts of the protective thin plate 6, and the hot air can be scattered out of gaps of the battery module after passing through the protective thin plate 6 because the battery module is not a closed space. The shape and size of the shell 1 and the upper cover 3, and the number of the electric cores 2 can be changed according to the needs of different vehicle types, the protective thin plate 6 can be set into other shapes, the cross section shape and size of the protective thin plate 6 can be matched with the cross section shape and size of the explosion-proof valve 7, and can also be partially matched, so long as after the electric core 2 is out of control due to heat and the explosion-proof valve 7 is opened, the protective thin plate 6 can guide hot air to penetrate out from the protective thin plate 6, and the hot air is prevented from returning to other electric cores 2 from the protective thin plate 6. In this embodiment, a square battery cell is taken as an example for introduction, and similarly, the concept of the present invention may also be applied to a cylindrical battery cell or other battery cells, and according to common general knowledge in the art, the structure of the present invention is adaptively adjusted for different battery cells, so as to obtain the battery module of the present invention applicable to different battery cells, and also belong to the protection scope of the present invention.
Preferably, the cross-sectional shape and area of the protective sheet 6 are matched with the cross-sectional shape and area of the explosion-proof valve 7 of the battery cell 2, so that the projection of the protective sheet 6 covers the explosion-proof valve 7. The projection of the protection thin plate 6 covers the explosion-proof valve 7, so that the electric core 2 is out of control due to heat, and after the explosion-proof valve 7 is opened, the sprayed hot air can penetrate through the protection thin plate 6 to the maximum extent, the radiating speed of the hot air is increased, and the possibility that the electric core 2 is affected is reduced.
Preferably, a plurality of sets of through hole pairs are formed in the heat insulation plate body 5, each through hole pair comprises a first through hole 8 and a second through hole 9 which are oppositely arranged, and the first through hole 8 and the second through hole 9 are respectively used for penetrating through the electrode 10 of the battery cell 2. The first through hole 8 and the second through hole 9 are arranged, so that the two electrodes 10 of the battery cell 2 can respectively penetrate through the first through hole 8 and the second through hole 9, the connection between the electrodes 10 and the electric connection plate 11 is not affected, and the through hole pairs are arranged, so that the thermal protection structure 4 is conveniently positioned.
In this embodiment, a square battery cell is taken as an example for introduction, the first through hole 8 and the second through hole 9 are respectively arranged at two symmetrical sides of the explosion-proof valve 7, and are set to be square shapes matched with the shape and size of the electrode 10, in order to save the assembly time of the battery module, the thermal protection structure 4 and the electric connection plate 11 are integrated and fixed together in advance, the electric connection plate 11 is fixed at the position corresponding to the first through hole 8 and the second through hole 9, the thermal protection structure 4 faces to one side surface of the upper cover 3, and when the battery module is assembled, the electrode 10 penetrates through the through hole pair and is connected with the electric connection plate 11. When the battery cell 2 is a cylindrical battery cell or other types of battery cells, the opening position, shape, and size of the first through hole 8 or the second through hole 9 may be adjusted according to common general knowledge in the art.
Preferably, the electrical connection plate 11 is connected to the electrodes 10 of the battery cells 2 passing through the through hole pairs, and the electrical connection plate 11 is covered with a heat insulation pad 12. The electric core 2 is in thermal runaway, hot air ejected after the explosion-proof valve 7 is opened penetrates through the heat insulation plate body 5 and then is emitted to a position between the thermal protection structure 4 and the upper cover 3, the electrode 10 penetrates through the through hole pair and is exposed in the space, the electric connection plate 11 connected with the electrode 10 is also exposed in the space, the electric connection plate 11 is covered with the heat insulation pad 12, and the hot air emitted to the space is prevented from transferring heat back to the electric core 2 through the electric connection plate 11 and the electrode 10.
As shown in fig. 5, in this embodiment, the first through hole 8 and the second through hole 9 are covered with a plurality of heat insulation pads 12 toward the upper cover 3, each heat insulation pad 12 is configured as a rectangular parallelepiped, the shape, size, and number of the heat insulation pads 12 can be adjusted according to actual needs, and the first through hole 8 and the second through hole 9 may be covered with a plurality of heat insulation pads 12, or both sides may be covered with a single heat insulation pad 12.
Preferably, a plurality of first protection grooves are formed in the first surface of the heat insulation plate body 5; the groove bottom of each first protection groove is used as the protection thin plate 6. The arrangement is simple and convenient to operate, easy to realize and beneficial to improving the working efficiency.
As shown in fig. 1, in this embodiment, the first protection groove is opened on a side surface of the heat insulation board body 5 facing the upper cover 3 and extends to a side far away from the upper cover 3, a groove bottom of the first protection groove is used as the protection thin plate 6, and a side surface of the heat insulation board body 5 facing away from the upper cover 3 is a plane.
As shown in fig. 5, in this embodiment, the first protection groove is opened on a side surface of the heat insulation board body 5 facing away from the upper cover 3 and extends to a side close to the upper cover 3, a groove bottom of the first protection groove is used as the protection thin plate 6, and a side surface of the heat insulation board body 5 facing the upper cover 3 is a plane.
Preferably, a plurality of second protection grooves are formed in the first surface of the heat insulation plate body 5 corresponding to the positions of the explosion-proof valves 7; a plurality of third protection grooves are formed in the second surface of the heat insulation plate body 5, and each third protection groove is arranged opposite to one second protection groove; and the joint of the second protection groove and the third protection groove is used as the protection thin plate 6. Thicker to thickness heat insulating board body 5 sets up the darker recess of degree of depth at a side surface, and difficult operation is through seting up at relative both sides surface the second protects the recess with the shallow two recesses of degree of depth only need be seted up to the third protection recess, and guarantees that the thickness of junction is less than first set for the threshold value and be greater than the second set for the threshold value can, reduced the operation degree of difficulty.
Preferably, a gap is provided between the thermal protection structure 4 and the upper cover 3; a gap is provided between the housing 1 and the upper cover 3. With the arrangement, the hot air can be favorably diffused to the space between the thermal protection structure 4 and the upper cover 3, and can be favorably and rapidly exhausted to the outside of the battery module from the space.
In this embodiment, the housing 1 is connected with the upper cover 3 through the circumferential buckle, the connection mode between the housing 1 and the upper cover 3 can be adjusted according to different requirements, the gap between the thermal protection structure 4 and the upper cover 3, and the gap between the housing 1 and the upper cover 3 can be adjusted according to the heat dissipation condition.
Preferably, a heat insulation sheet is arranged between the adjacent electric cores 2. Set up the heat insulating sheet between adjacent electric core 2, further the separation the thermal diffusion between the inside adjacent electric core 2 of battery module.
The manufacturing and using processes of the battery module are further described as follows:
the method comprises the steps that a proper number of battery cores 2 are placed in a shell 1, adjacent heat insulation sheets are arranged between the battery cores 2, each battery core 2 faces towards the middle of one side surface of an upper cover 3, an explosion-proof valve 7 is arranged, two symmetrical sides of the explosion-proof valve 7 are provided with electrodes 10, the position, corresponding to the explosion-proof valve 7, of a heat insulation plate body 5 is provided with a first protection groove, the groove bottom of the first protection groove is the protection thin plate 6, the thickness of the protection thin plate 6 is smaller than the maximum thickness value which can be penetrated by hot air after the battery core is thermally out of control, the maximum thickness value which can be penetrated by the hot air after the hot air passes through a pressure reduction obtained after the protection thin plate 6, the position, corresponding to the electrodes 10, of the heat insulation plate body 5 is provided with a first through hole 8 and a second through hole 9, the heat protection structure 4 is abutted to the battery cores 2, the electrodes 10 pass through the first through hole 8 and the second through hole 9 respectively, the electrodes 10 are connected through the electric connection plate 11, the electric connection plate 11 covers the heat insulation pad 12, the heat insulation pad is connected with the shell 1, the heat insulation plate 1 is connected with the shell, and the heat insulation plate 3, and the gap is arranged between the shell and the heat insulation plate 1 and the heat insulation plate 3.
Through electric core 2 with set up between the upper cover 3 thermal protection structure 4, and with 2 butts of electric core, and thermal protection structure 4 corresponds explosion-proof valve 7 department of electric core 2 sets up protection sheet metal 6, guide 2 thermal runaway of electric core and explosion-proof valve 7 open back spun hot gas stream follow protection sheet metal 6 department blowout, and prevent spun hot gas flow through other protection sheet metal 6 returns to other electric core 2 has blocked thermal convection and radiation of thermal runaway electric core spun hot gas to adjacent electric core 2.
The invention also provides a battery pack assembly which comprises an assembly shell and a plurality of battery modules arranged in the assembly shell.
Preferably, the battery pack assembly further comprises at least one main explosion-proof valve, and the at least one main explosion-proof valve is arranged on one side surface of the main shell. The total explosion-proof valve is arranged in the battery pack assembly, so that when the temperature and the pressure in the battery pack assembly reach a certain value, the temperature and the pressure in the battery pack assembly can be released by the total explosion-proof valve, and dangerous accidents such as explosion of the battery pack assembly are prevented.
The setting number of the total explosion-proof valves can be set to be one or more according to needs, and the setting position of the total explosion-proof valves can be determined according to experimental results.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a battery module, includes the casing, sets up a plurality of electric cores in the casing, locates the upper cover on a plurality of electric cores with electric connection board and the cover that electric core is connected, its characterized in that still includes:
the thermal protection structure is arranged between the battery cell and the upper cover and is abutted against the battery cell; the thermal protection structure comprises a thermal insulation board body, wherein the thermal insulation board body is prepared from a thermal insulation material; at least one protective thin plate is formed on the heat insulation plate body; each protective thin plate corresponds to an explosion-proof valve of the battery cell; the thickness of the protective sheet is smaller than a first set threshold and larger than a second set threshold; the first set threshold value is a maximum thickness value suitable for hot airflow to pass through after the thermal runaway of the battery core; the hot airflow after the thermal runaway of the battery core passes through the protective sheet to obtain a hot airflow after pressure reduction, and the second set threshold is a maximum thickness value suitable for the hot airflow after the pressure reduction to pass through;
a plurality of groups of through hole pairs are formed in the heat insulation plate body, each through hole pair comprises a first through hole and a second through hole which are oppositely arranged, and the first through hole and the second through hole are respectively used for penetrating through electrodes of the battery core;
the electric connection plate is connected with the electrodes of the battery cells penetrating through the through hole pairs, and a heat insulation pad covers the electric connection plate.
2. The battery module according to claim 1, wherein:
the cross-sectional shape and the area of the protective thin plate are matched with the cross-sectional shape and the area of the explosion-proof valve of the battery cell, so that the projection of the protective thin plate covers the explosion-proof valve.
3. The battery module according to claim 1 or 2, wherein:
a plurality of first protection grooves are formed in the first surface of the heat insulation plate body; the groove bottom of each first protection groove is used as the protection thin plate.
4. The battery module according to claim 1 or 2, wherein:
a plurality of second protection grooves are formed in the first surface of the heat insulation plate body corresponding to the positions of the explosion-proof valves;
a plurality of third protection grooves are formed in the second surface of the heat insulation plate body, and each third protection groove is arranged opposite to one second protection groove;
and the joint of the second protection groove and the third protection groove is used as the protection thin plate.
5. The battery module according to claim 1 or 2, wherein:
a gap is arranged between the thermal protection structure and the upper cover;
a gap is arranged between the shell and the upper cover.
6. The battery module according to claim 1 or 2, wherein:
and a heat insulation sheet is arranged between every two adjacent electric cores.
7. A battery pack assembly comprising an overall housing, and further comprising a plurality of battery modules according to any one of claims 1-6 disposed within the overall housing.
8. The battery pack assembly of claim 7, further comprising:
at least one main explosion-proof valve, at least one main explosion-proof valve sets up in a side surface of main casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010535295.8A CN111725454B (en) | 2020-06-12 | 2020-06-12 | Battery module and battery pack assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010535295.8A CN111725454B (en) | 2020-06-12 | 2020-06-12 | Battery module and battery pack assembly |
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| Publication Number | Publication Date |
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| CN111725454A CN111725454A (en) | 2020-09-29 |
| CN111725454B true CN111725454B (en) | 2022-11-22 |
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| CN202010535295.8A Active CN111725454B (en) | 2020-06-12 | 2020-06-12 | Battery module and battery pack assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023542807A (en) * | 2020-10-19 | 2023-10-12 | ジアンス・コンテンポラリー・アンプレックス・テクノロジー・リミテッド | Batteries, electrical devices, battery manufacturing methods and devices |
| WO2022082387A1 (en) | 2020-10-19 | 2022-04-28 | 江苏时代新能源科技有限公司 | Battery, electrical device, and method and device for preparing battery |
| CN112701393B (en) * | 2020-12-29 | 2023-06-09 | 长城汽车股份有限公司 | Battery module and vehicle with same |
| CN214428739U (en) * | 2020-12-31 | 2021-10-19 | 江苏塔菲尔动力系统有限公司 | Thermal runaway prevention assembly and battery module |
| CN113437403A (en) * | 2021-08-26 | 2021-09-24 | 蜂巢能源科技有限公司 | Battery module, battery pack and power device |
| CN114628844A (en) * | 2022-03-24 | 2022-06-14 | 广州小鹏汽车科技有限公司 | Battery box, power battery assembly and vehicle |
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| CN111725454A (en) | 2020-09-29 |
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