CN115668612A - Battery core, battery pack, system and electric automobile - Google Patents
Battery core, battery pack, system and electric automobile Download PDFInfo
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- CN115668612A CN115668612A CN202080098764.2A CN202080098764A CN115668612A CN 115668612 A CN115668612 A CN 115668612A CN 202080098764 A CN202080098764 A CN 202080098764A CN 115668612 A CN115668612 A CN 115668612A
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- proof valve
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- 239000003792 electrolyte Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims description 36
- 238000001514 detection method Methods 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 6
- 239000011258 core-shell material Substances 0.000 abstract description 35
- 238000005070 sampling Methods 0.000 abstract description 22
- 239000007789 gas Substances 0.000 description 38
- 238000010586 diagram Methods 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 6
- 238000004880 explosion Methods 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H01M50/30—Arrangements for facilitating escape of gases
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
-
- 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)
- Battery Mounting, Suspending (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The application discloses electric core, battery package, system and electric automobile relates to battery technical field. Wherein, this electric core includes electric core and electric core shell, electric core set up in inside the electric core shell, electric core shell includes: the positive pole column, the negative pole column and the explosion-proof valve; the positive pole column and the negative pole column are positioned on the upper surface of the battery cell shell; the explosion-proof valve is positioned on the side surface of the battery cell shell; the explosion-proof valve is used for opening when the internal pressure of the battery cell shell is larger than or equal to a valve opening pressure threshold value. The explosion-proof valve of this electric core sets up in the side of electric core shell, not with just, negative pole post on same surface, when explosion-proof valve opened the valve, takes out electrolyte steam and partial electrolyte direction electric core shell's side, consequently can not contact power run-on and sampling pencil, avoids producing the short circuit and strikes sparks, has promoted the security.
Description
The application relates to the technical field of batteries, in particular to a battery core, a battery pack, a system and an electric automobile.
A Lithium-ion battery (Lithium-ion battery) is a rechargeable battery, and because of its advantages of small size, light weight, long cycle life, etc., it is widely used in the fields of communication base stations, data centers, energy storage power stations, electric vehicles, etc.
In practical application, the battery core of the lithium ion battery contains electrolyte and active lithium, has the characteristics of high activity, flammability and the like, and is easy to cause fire accidents. Therefore, in order to prevent the explosion of the battery cell of the lithium ion battery under the abnormal conditions of overcharge, short circuit and the like, the cover plate part of the battery cell shell is provided with the explosion-proof valve, and when the internal pressure of the battery cell shell is higher, the valve is opened to release the pressure, so that the battery cell explosion is prevented.
However, the current explosion-proof valve and the positive and negative poles of the battery cell are arranged on the cover plate together, the positive and negative poles can be connected with the power connecting bar and the sampling wire harness, and when electrolyte steam and part of electrolyte brought out when the explosion-proof valve is opened contacts with the power connecting bar and the sampling wire harness, short circuit ignition can occur, so that the battery is easy to burn, and potential safety hazards exist.
Disclosure of Invention
The application provides an electricity core, battery package, system and electric automobile, electrolyte contact power connector bar and sampling pencil of taking out when avoiding explosion-proof valve open valve have promoted the security.
In a first aspect, the present application provides an electrical core, which includes an electrical core and an electrical core shell, wherein the electrical core is disposed inside the electrical core shell, and the electrical core shell includes an anode post, a cathode post and an explosion-proof valve. The positive pole column and the negative pole column are positioned on the upper surface of the battery cell shell; the explosion-proof valve is positioned on the side surface of the battery cell shell; the explosion-proof valve is used for opening when the internal pressure of the battery cell shell is larger than or equal to a valve opening pressure threshold value.
The application provides an explosion-proof valve setting of electricity core is in the side of electric core shell, not with just, negative pole post on same surface, when explosion-proof valve opened the valve, takes out electrolyte steam and partial electrolyte direction electric core shell's side, consequently can not contact power run-on and sampling pencil, avoids producing the short circuit and strikes sparks, has promoted the security.
With reference to the first aspect, in a first possible implementation manner, the battery cell casing includes a cover plate and a casing. The positive pole post and the negative pole post are positioned on the cover plate. The side surface of the shell is the side surface of the battery cell shell, namely, the anti-explosion valve is arranged on the side surface of the shell and is not positioned on the same surface with the positive pole and the negative pole.
With reference to the first aspect, in a second possible implementation manner, the cell casing includes a cover plate and a casing, and the cover plate includes a first surface and a second surface. The second surface is perpendicular to the first surface and is connected with the side edge of the first surface, and the explosion-proof valve is positioned on the second surface. The first surface is the upper surface of the battery cell shell, and the second surface is connected with the side surface of the shell.
The cover plate of the implementation mode comprises two surfaces which are perpendicular to each other, the positive pole and the negative pole are arranged on the first surface, and the explosion-proof valve is arranged on the second surface. When the explosion-proof valve is opened, electrolyte vapor and part of electrolyte are brought out and guided to the second surface, so that the power connecting row and the sampling wire harness connected with the positive pole and the negative pole of the first surface cannot be contacted.
With reference to the first aspect, in a third possible implementation manner, the battery cell casing is a cuboid, a cube, or a cylinder.
In a second aspect, the present application further provides a battery pack, where the battery pack includes at least one electrical core described in the above implementation manners. The explosion-proof valve of this electric core sets up in the side of electric core shell, not with just, negative pole post on same surface, when explosion-proof valve opened the valve, takes out electrolyte steam and partial electrolyte direction electric core shell's side, consequently can not contact power run-on and sampling pencil, avoids producing the short circuit and strikes sparks, has promoted the security of battery package.
With reference to the second aspect, in a first possible implementation manner, the battery pack further includes a liquid guide groove. The explosion-proof valve of the at least one battery cell shell faces the groove body of the liquid guide groove. The liquid guide groove is used for providing a directional flow passage for gas and electrolyte exhausted from the explosion-proof valve when the explosion-proof valve is opened.
The liquid guide groove also has the function of collecting electrolyte vapor and part of electrolyte discharged from the explosion-proof valve.
With reference to the second aspect, in a second possible implementation manner, a temperature sensor is disposed in the liquid guide groove. The temperature sensor is used for detecting the temperature in the liquid guide groove and sending the detection result to a battery management system BMS of the battery pack.
And when the BMS determines that the temperature rises to exceed the preset threshold value by using the detection result, determining that the current explosion-proof valve is opened.
With reference to the second aspect, in a third possible implementation manner, a gas sensor is arranged in the liquid guide groove. The gas sensor is used for detecting whether preset types of gas appear in the liquid guide groove or not and sending a detection result to a battery management system BMS of the battery pack. The type of the gas sensor can be determined according to the type of gas generated when the battery cell is abnormal. For example, if carbon monoxide (CO) gas is generated when the cell is abnormal, a gas sensor for detecting carbon monoxide may be used.
When the BMS determines that the preset type of gas is present in the liquid guide groove by using the detection result of the gas sensor, the BMS determines that the current explosion-proof valve is opened,
with reference to the second aspect, in a fourth possible implementation manner, a fire fighting module is arranged in the liquid guide groove. And when the BMS determines that the explosion-proof valve is opened by using the detection result, the BMS sends a fire-fighting command to the fire-fighting module. The fire control module is used for triggering the fire control action after obtaining the fire control order, cools down and puts out a fire the battery package promptly.
With reference to the second aspect, in a fifth possible implementation manner, the battery pack further includes a power protection cover plate. This power protection apron covers the positive post and the negative pole post of at least one electric core to further avoid explosion-proof valve combustion gas, electrolyte steam and electrolyte etc. to contact positive post, negative pole post and power connection row and sampling pencil, promote the security of battery package.
In a third aspect, the present application further provides a power supply system, where the power supply system includes the battery pack described in any one of the above implementation manners. The power supply system is used for supplying power to a connected load. The power supply system can be applied to the fields of communication base stations, data centers, energy storage power stations, electric automobiles and the like. In some embodiments, the type of battery pack may be a lithium ion battery pack.
In a fourth aspect, the present application further provides an electric vehicle, which includes an electric motor and the battery pack provided in the above implementation manner. The battery pack is used for providing electric energy for the motor; the electric motor is used for converting electric energy into mechanical energy to drive the electric automobile.
Fig. 1 is a side view of a cell;
fig. 2 is a schematic structural diagram of the battery cell shown in fig. 1;
fig. 3A is a front view of a battery cell provided in an embodiment of the present application;
fig. 3B is a side view corresponding to the battery cell shown in fig. 3A provided in an embodiment of the present application;
fig. 3C is a schematic diagram of a cell casing provided in an embodiment of the present application when the cell casing is a cylinder;
fig. 4 is a schematic diagram of another battery cell provided in an embodiment of the present application;
fig. 5 is a schematic diagram of another battery cell provided in an embodiment of the present application;
fig. 6 is a schematic diagram of another battery cell provided in an embodiment of the present application;
fig. 7 is a schematic diagram of another battery cell provided in an embodiment of the present application;
fig. 8 is a schematic view of another battery cell provided in an embodiment of the present application;
fig. 9 is a top view of a battery pack according to an embodiment of the present disclosure;
fig. 10 is a side view of the battery pack of fig. 9 provided by an embodiment of the present application;
fig. 11 is a front view of another battery pack provided in an embodiment of the present application;
fig. 12 is a side view of a battery pack corresponding to fig. 11 provided in an embodiment of the present application;
fig. 13 is a schematic diagram of a power supply system according to an embodiment of the present application;
fig. 14 is a schematic view of an electric vehicle according to an embodiment of the present application.
In order to make those skilled in the art better understand the technical solutions provided in the embodiments of the present application, an application scenario of the technical solutions provided in the present application is described below.
Referring to fig. 1 and fig. 2 together, fig. 1 is a side view of a battery cell, and fig. 2 is a schematic structural diagram of the battery cell shown in fig. 1.
The battery cell in the figure includes a battery cell core 1 and a battery cell casing.
The cell casing includes a cover plate 40 and a case 50.
The cover plate 40 is provided with a positive post 10, a negative post 20, and an explosion-proof valve 30.
The positive pole post 10 and the negative pole post 20 are connected with the battery core body 1 arranged in the shell.
The explosion-proof valve 30 is used for opening the valve to release pressure when the internal pressure of the battery cell shell is larger, so that explosion is prevented.
However, the explosion-proof valve 30, the positive post 10 and the negative post 20 are disposed on the cover plate 40, the positive post 10 and the negative post 20 are connected to the power connecting bar and the sampling wire harness, and when the electrolyte vapor brought out when the explosion-proof valve 30 is opened and part of the electrolyte contacts the power connecting bar and the sampling wire harness, short circuit ignition may occur, which easily causes battery combustion, thereby causing potential safety hazards.
In order to solve the problems, the application provides an electric core, a battery pack, a system and an electric automobile. Wherein, the explosion-proof valve of this electricity core does not set up at same plane with just, negative pole post, but sets up the side at electric core shell, consequently avoids electrolyte steam and electrolyte contact power run-on and the sampling pencil of taking out when explosion-proof valve open valve, and then avoids taking place the short circuit and strike sparks, has promoted the security.
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application for better understanding of the embodiments of the present application.
The terms "first", "second", and the like in the description of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection, a removable connection, or an integral part; may be directly connected or may be indirectly connected through an intermediate.
It should be understood that the directional descriptions of "upper", "lower", "surface", and "side" in the present application are directed to the positional relationships shown in the drawings of the present application.
The arrangement positions of the positive electrode column and the negative electrode column in the following embodiments may be exchanged.
The first embodiment is as follows:
the embodiment of the application provides a battery cell shell, which is specifically described below with reference to the accompanying drawings.
See also fig. 3A and 3B. Fig. 3A is a front view of a battery cell casing provided in an embodiment of the present application, and fig. 3B is a side view corresponding to a battery cell shown in fig. 3A.
The battery cell comprises a battery cell core body 1 and a battery cell shell 2. The battery cell shell 2 is a closed shell, and the battery cell core body 1 is arranged inside the battery cell shell 2.
The cell casing 2 is provided with a positive electrode post 10, a negative electrode post 20, and an explosion-proof valve 30.
The positive pole 10 and the negative pole 20 are located on the upper surface of the cell casing 2, and are connected to the cell core 1 inside the cell casing.
The explosion-proof valve 30 is located on the side of the cell housing 2. The side surface of the positive electrode pillar 10 may be disposed closer to the side surface of the negative electrode pillar 20, and the embodiment of the present application is not particularly limited. In some embodiments, in order to discharge the gas inside the cell casing 2 as quickly as possible in time, and achieve rapid depressurization, considering that the gas is generally less dense than the electrolyte, the explosion-proof valve 30 is disposed at the upper end (i.e., higher) of the side surface of the cell casing 2.
The explosion-proof valve 30 is configured to be opened when the internal pressure of the battery cell casing 2 is greater than or equal to a valve opening pressure threshold, so as to reduce the internal pressure of the battery cell casing 2, thereby preventing the battery cell from exploding.
The cell casing 2 may be a cuboid, a cube, a cylinder, or another shape, and the shape of the cell casing is not specifically limited in the embodiment of the present application. Fig. 3C shows a schematic diagram of the cell casing in a cylindrical shape.
Just, power connection row and sampling pencil can be connected to the negative pole post, and the electric core shell that this application embodiment provided sets up explosion-proof valve in the side of electric core shell, not with just, negative pole post on same surface, when explosion-proof valve open valve, the side of electric core shell has been led to electrolyte steam and partial electrolyte of taking out, consequently can not contact power connection row and sampling pencil, avoid producing the short circuit and strike sparks, promoted the security.
The following is described in combination with a specific implementation manner of the cell shell, and for convenience of understanding, the cell shell is used as a cuboid for description, and the principle is similar when the cell shell is in other shapes such as a square and a cylinder, and the embodiment of the present application is not repeated one by one.
The second embodiment:
referring to fig. 4, the figure is a schematic view of another battery cell provided in an embodiment of the present application.
The battery core comprises a battery core body (not shown in the figure) and a battery core shell, wherein the battery core body is arranged in the battery core shell.
The cell casing includes a cover plate 40 and a case 50.
The side of the casing 50, i.e. the side of the cell casing, and the explosion-proof valve 30 is arranged at the side of the casing.
The illustrated cover 40 and the housing 50 are connected to form a closed cell casing, and thus, the housing 50 includes four sides and a bottom.
The cover plate 40 and the housing 50 may be connected by welding or other connection methods, and the embodiment of the present application is not particularly limited.
The utility model provides a side of battery core shell with explosion-proof valve setting at battery core shell's casing, and just, the negative pole post setting is in battery core shell's side, and when explosion-proof valve opened the valve, the side of battery core shell has been led to electrolyte steam and partial electrolyte of taking out, consequently can not contact power run-on and sampling pencil, avoids producing the short circuit and strikes sparks, has promoted the security.
Example three:
another cell casing implementation is described below.
Referring to fig. 5, the figure is a schematic view of another battery cell provided in an embodiment of the present application.
The cell casing of the illustrated cell includes a cover plate 40 and a casing 50. Wherein the cover plate 40 comprises a first surface 401 and a second surface 402.
The second surface 402 is perpendicular to the first surface 401 and connected to the side of the first surface 401, i.e. the side view of the cover plate 40 is "L" shaped.
The explosion proof valve 30 is located on the second surface 402.
The second surface 402 is connected to a side of the housing 50.
For convenience of description, the second surface 402 is connected to the first side 501 of the casing 50, and the surface of the casing 50 opposite to the first side 501 is a second side 502, and with continued reference to fig. 5, in order to form a closed cell casing after the cover plate 40 and the casing 50 are connected, the area of the side formed after the second surface 402 is connected to the first side 501 is equal to the area of the second side 502.
The size of the area of the second surface 402 is not particularly limited in the embodiment of the present application, but the second surface 402 should be sufficient for disposing the explosion-proof valve 30.
The shape of the second surface 402 is not particularly limited in the present embodiment, and the second surface 402 may be rectangular in fig. 5, or the second surface 402 may be square. See also the schematic diagram of a cell shown in fig. 6, in which the second surface 402 is triangular; referring also to the schematic diagram of the cell shown in fig. 7, the second surface 402 is an irregular polygon. The shape of the first side on the housing 50 also changes correspondingly with the shape of the second surface 402.
The second surface 402 and the first side of the housing 50 may be connected by welding and other possible connection methods, and the embodiment of the present application is not particularly limited.
Referring to fig. 8, the figure is a schematic view of another battery cell provided in an embodiment of the present application.
The cell casing of the illustrated cell is a cylinder, the top surface of the cell casing is a first surface 401 of the cover plate 40, the first surface 401 is provided with the positive electrode post 10 and the negative electrode post 20, and the second surface 402 of the cover plate is perpendicular to the first surface 401 and is connected to a side edge of the first surface 401.
The explosion proof valve 30 is located on the second surface 402.
The cover 40 and the casing 50 form a closed cell casing for accommodating a cell core.
To sum up, the battery core shell that this application embodiment provided sets up explosion-proof valve in the side of battery core shell's casing, and just, the negative pole post sets up the apron at battery core shell, and when explosion-proof valve opened the valve, the side of battery core shell has been led to electrolyte steam and partial electrolyte of taking out, consequently can not contact power run-on and sampling pencil, avoids producing the short circuit and strikes sparks, has promoted the security.
Example four:
based on the electric core that above embodiment provided, this application embodiment still provides a battery package, can include at least one above embodiment the electric core, consequently when the electricity core of this battery appears unusually, from the side of the battery core shell of the orientation of the electrolyte steam and partial electrolyte of discharge in the explosion-proof valve of battery core shell, consequently can not contact power run-on and sampling pencil, avoid producing the short circuit and strike sparks, promoted the security.
The following description is continued by taking the shape of the cell casing as a rectangular parallelepiped, and the principle is similar when the cell casing is in other shapes, and the embodiment of the present application is not particularly limited.
See also fig. 9 and 10. Fig. 9 is a top view of a battery pack according to an embodiment of the present disclosure, and fig. 10 is a side view of the battery pack shown in fig. 9 according to an embodiment of the present disclosure.
The battery pack includes at least one cell and a sink 60.
In the embodiment of the present application, the number of the battery cells in the battery pack is not specifically limited, and the example that the battery pack includes four battery cells is only illustrated in the drawings.
For specific descriptions of the battery cell, reference may be made to the above embodiments, which are not described herein again.
The lead channels 60 of the plurality of cells are arranged at the same relative position, for example, are all arranged on the side face adjacent to the negative pole 20.
The explosion-proof valve 30 of each cell faces the trough body of the liquid guide groove 60.
The liquid guide groove 60 is used for providing a directional flow passage for gas, electrolyte vapor and part of electrolyte discharged from the explosion-proof valve 30 when the explosion-proof valve 30 is opened.
The liquid guide groove 60 also has a function of collecting electrolyte vapor and part of the electrolyte discharged from the explosion-proof valve 30.
To sum up, because the explosion-proof valve setting of the electric core of this battery package is in the side of electric core shell, and just, negative pole post setting is in electric core shell's apron (top surface), when explosion-proof valve opened the valve, the electrolyte steam of taking out and partial electrolyte have led electric core shell's side to carry out directional collection and water conservancy diversion through the liquid guide groove, consequently can not contact power run-on and sampling pencil, avoid producing the short circuit and strike sparks, promoted the security of battery package.
Further, in some embodiments, a temperature sensor is disposed in the fluid guide groove 60, and the temperature sensor is used for detecting the temperature in the fluid guide groove 60 and sending the detection result to a Battery Management System (BMS) of the Battery pack.
Normally, when abnormal conditions such as overcharge and short circuit occur inside the battery core, the temperature inside the battery core rises, and when the explosion-proof valve is opened to release the pressure, the temperature of the brought gas, electrolyte steam and part of electrolyte is higher, so that whether potential safety hazards exist can be judged by detecting the change of the temperature through the temperature sensor. In some embodiments, the BMS determines that the explosion-proof valve 30 is opened at present and there is a safety hazard when it is determined by the BMS using the detection result that the temperature rises above the preset threshold.
In some embodiments, a temperature sensor is placed relatively close to the explosion-proof valve 30 to quickly and accurately detect changes in temperature.
The number of temperature sensors disposed in the liquid guide groove 60 is not particularly limited in the embodiment of the present application.
In some embodiments, the channel 60 may include only one temperature sensor, or a plurality of temperature sensors disposed at equal intervals.
In other embodiments, in order to determine the cell for opening the explosion-proof valve 30 more accurately, a temperature sensor may be correspondingly disposed in the liquid guide groove 60 at the explosion-proof valve 30 of each cell.
The liquid guide groove 60 may further include a gas sensor for detecting whether a predetermined type of gas is present in the liquid guide groove and transmitting a detection result to a battery management system of the battery pack.
The embodiment of the present application does not specifically limit the type of the gas sensor. In practical application, the type of the gas sensor can be determined according to the type of gas generated when the battery cell is abnormal. For example, if carbon monoxide (CO) gas is generated when the cell is abnormal, a gas sensor for detecting carbon monoxide may be used.
In some embodiments, when the BMS determines that a preset kind of gas is present in the liquid guide tank using the detection result of the gas sensor, it is determined that the explosion-proof valve 30 is currently opened, which is a safety hazard.
The number of gas sensors provided in the liquid guide groove 60 is not particularly limited in the embodiment of the present application.
In some embodiments, the fluid sink 60 may include only one gas sensor, or a plurality of gas sensors disposed at equal intervals.
In other embodiments, in order to determine the cell opening the explosion-proof valve 30 more accurately, a gas sensor may be disposed in the liquid guide groove 60 at the explosion-proof valve 30 of each cell.
The battery management system of the battery pack can determine whether the battery core has a fault according to the detection results of the temperature sensor and the gas sensor.
In some embodiments, the liquid guide groove further comprises a fire fighting module, and the fire fighting module has the functions of cooling and extinguishing fire.
The BMS sends a fire fighting command to the fire fighting module when it is determined that the explosion-proof valve 30 is opened using the detection results of the temperature sensor and/or the gas sensor.
The fire-fighting module is used for triggering a fire-fighting action after acquiring a fire-fighting command, namely cooling and extinguishing a fire.
In summary, the BMS of the battery pack provided by the embodiment of the present application can determine the state of the explosion-proof valve timely and accurately through the detection result of the temperature sensor and/or the gas sensor, and can also trigger the fire-fighting action of the fire-fighting module when determining that the explosion-proof valve 30 is opened. In some embodiments, when the temperature sensor and/or the gas sensor are arranged in one-to-one correspondence with the explosion-proof valve 30, the fire-fighting module can also be arranged in one-to-one correspondence with the explosion-proof valve 30, and then the fire-fighting module can accurately extinguish the fire of the battery cell for opening the explosion-proof valve under the control of the BMS.
Referring to fig. 11 and 12 together, fig. 11 is a front view of another battery pack according to an embodiment of the present disclosure; fig. 12 is a side view of a battery pack corresponding to fig. 11 provided in an embodiment of the present application.
This battery pack compares with fig. 10, and still includes power protection cover plate 60.
The power protection cover plate 60 covers the positive and negative poles of the battery cells in the battery pack.
When the explosion-proof valve 30 is opened, although gas, electrolyte vapor, electrolyte and the like discharged from the explosion-proof valve 30 are guided to the side surface of the cell housing, a part of the discharged materials may contact the positive pole, the negative pole, the power connection bar and the sampling wire harness, so that the safety of the battery pack is further improved by providing the power protection cover plate 60.
Example five:
based on the battery pack provided by the above embodiment, the embodiment of the present application further provides a power supply system, which is specifically described below with reference to the accompanying drawings.
Referring to fig. 13, the figure is a schematic diagram of a power supply system according to an embodiment of the present application.
The power supply system 100 provided by the embodiment of the present application includes a battery pack 200.
For specific description of the battery pack 200, reference may be made to the fourth embodiment above, and details of the embodiment of the present application are not repeated herein.
The power supply system 100 is used for supplying power to a connected load, and the number of the battery packs 200 in the power supply system is not particularly limited in the embodiment of the present application. The power supply system 100 can be applied to the fields of communication base stations, data centers, energy storage power stations, electric vehicles and the like. In some embodiments, the battery pack 200 may be of the type that is a lithium ion battery pack.
To sum up, the battery pack of the power supply system that this application embodiment provided has adopted the electric core that above embodiment provided, and the explosion-proof valve setting of this electric core is in electric core shell's side, not with just, negative pole post in same surface, when explosion-proof valve opens the valve, takes out electrolyte steam and partial electrolyte direction electric core shell's side, consequently can not contact power run-on and sampling pencil, avoids producing the short circuit and strikes sparks, has promoted power supply system's security.
In some embodiments, the battery pack further comprises a fluid-conducting channel that provides a directional flow path for gas, electrolyte vapor and a portion of electrolyte that is vented from the explosion-proof valve when the explosion-proof valve is open. In other embodiments, the liquid guide groove further comprises a temperature sensor and/or a gas sensor, the BMS of the battery pack can timely and accurately determine the state of the explosion-proof valve through the detection result of the temperature sensor and/or the gas sensor, and can trigger the fire-fighting action of the explosion-proof module in the liquid guide groove when the explosion-proof valve is determined to be opened. The battery pack can be further provided with a power protection cover plate so as to further prevent the discharge of the explosion-proof valve from contacting the positive pole column, the negative pole column, the power connection row and the sampling wire harness, and the safety of the battery pack is improved.
Example six:
based on the battery pack provided by the above embodiment, the embodiment of the application further provides an electric vehicle, which is specifically described below with reference to the accompanying drawings.
Referring to fig. 14, the drawing is a schematic view of an electric vehicle according to an embodiment of the present application.
The electric vehicle 400 includes a battery pack 200 and a motor 300.
The battery pack 200 is used to supply electric power to the motor 300.
The motor 300 is used to convert electric energy into mechanical energy to drive the electric vehicle 400.
For specific description of the battery pack 200, reference may be made to the fourth embodiment above, and details of the embodiments of the present application are not repeated herein.
To sum up, the battery pack of electric automobile that this application embodiment provided has adopted the electric core that above embodiment provided, and the explosion-proof valve setting of this electric core is in the side of electric core shell, not with just, negative pole post at same surface, when explosion-proof valve opens the valve, takes out electrolyte steam and partial electrolyte direction electric core shell's side, consequently can not contact power run-on and sampling pencil, avoids producing the short circuit and strikes sparks, has promoted electric automobile's security.
In some embodiments, the battery pack further comprises a liquid guiding groove, and the liquid guiding groove provides a directional flow passage for gas, electrolyte vapor and partial electrolyte exhausted from the explosion-proof valve when the explosion-proof valve is opened. In other embodiments, the liquid guide groove further comprises a temperature sensor and/or a gas sensor, the BMS of the battery pack can timely and accurately determine the state of the explosion-proof valve through the detection result of the temperature sensor and/or the gas sensor, and can trigger the fire-fighting action of the explosion-proof module in the liquid guide groove when the explosion-proof valve is determined to be opened. The battery pack can also be provided with a power protection cover plate so as to further prevent the discharge of the explosion-proof valve from contacting the positive pole column, the negative pole column, the power connection row and the sampling wire harness, and further improve the safety of the electric automobile.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should 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 such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (12)
- The utility model provides an electric core, its characterized in that, includes electric core and cell shell, the electric core set up in inside the cell shell, the cell shell includes: the positive pole column, the negative pole column and the explosion-proof valve;the positive pole column and the negative pole column are positioned on the upper surface of the battery cell shell;the explosion-proof valve is positioned on the side surface of the battery cell shell;the explosion-proof valve is used for being opened when the internal pressure of the battery cell shell is larger than or equal to a valve opening pressure threshold value.
- The cell of claim 1, wherein the cell casing comprises a cover plate and a casing;the positive pole column and the negative pole column are positioned on the cover plate;the side surface of the shell is the side surface of the battery cell shell.
- The cell of claim 1, wherein the cell casing comprises a cover plate and a casing, the cover plate comprising a first surface and a second surface;the second surface is perpendicular to the first surface and is connected with the side edge of the first surface;the first surface is an upper surface of the cell casing;the explosion-proof valve is positioned on the second surface;the second surface is connected with a side of the housing.
- The electrical core according to any of claims 1 to 3, wherein the electrical core housing is a cuboid, a cube or a cylinder.
- A battery pack, characterized in that the battery pack comprises at least one electric core according to any of claims 1 to 4.
- The battery pack according to claim 5, further comprising: a liquid guide groove;the explosion-proof valve of the at least one battery cell shell faces the groove body of the liquid guide grooveAnd the liquid guide groove is used for providing a directional flow passage for gas and electrolyte exhausted from the explosion-proof valve when the explosion-proof valve is opened.
- The battery pack according to claim 6, wherein a temperature sensor is provided in the liquid guide groove;the temperature sensor is used for detecting the temperature in the liquid guide groove and sending a detection result to a battery management system BMS of the battery pack.
- The battery pack according to claim 6, wherein a gas sensor is provided in the liquid guide groove;and the gas sensor is used for detecting whether preset types of gas appear in the liquid guide groove or not and sending a detection result to a battery management system BMS of the battery pack.
- The battery pack of any one of claims 7 or 8, wherein a fire fighting module is arranged in the liquid guide groove;the BMS sends a fire-fighting command to the fire-fighting module when the detection result is used for determining that the explosion-proof valve is opened;the fire-fighting module is used for triggering fire-fighting actions after the fire-fighting command is acquired.
- The battery pack of any one of claims 5-9, further comprising a power protection cover plate;the power protection cover plate covers the positive pole column and the negative pole column of the at least one battery cell.
- A power supply system comprising the battery pack according to any one of claims 5 to 10;the power supply system is used for supplying power to a connected load.
- An electric vehicle comprising an electric motor and the battery pack according to any one of claims 5 to 10;the battery pack is used for providing electric energy for the motor;the electric motor is used for converting the electric energy into mechanical energy to drive the electric automobile.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/115571 WO2022056722A1 (en) | 2020-09-16 | 2020-09-16 | Battery cell, battery pack, system, and electric vehicle |
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| CN115668612A true CN115668612A (en) | 2023-01-31 |
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| CN202080098764.2A Pending CN115668612A (en) | 2020-09-16 | 2020-09-16 | Battery core, battery pack, system and electric automobile |
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| WO (1) | WO2022056722A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102022119112B4 (en) | 2022-07-29 | 2024-09-19 | Eugen Forschner Gmbh | Pressure compensation device for an electrochemical device |
| CN115621587A (en) * | 2022-09-09 | 2023-01-17 | 江苏正力新能电池技术有限公司 | Battery pack, electric device and thermal runaway detection and control method of battery pack |
| CN117293433B (en) * | 2023-11-27 | 2024-03-26 | 珠海科创储能科技有限公司 | Immersed liquid-cooled battery system and explosion-proof method |
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| WO2012014348A1 (en) * | 2010-07-28 | 2012-02-02 | パナソニック株式会社 | Cell module and cell pack |
| JP2012079510A (en) * | 2010-09-30 | 2012-04-19 | Gs Yuasa Corp | Battery module and battery pack |
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| CN203312374U (en) * | 2013-05-13 | 2013-11-27 | 深圳市比里通电子科技有限公司 | Soft battery cell structure of novel lithium battery |
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2020
- 2020-09-16 CN CN202080098764.2A patent/CN115668612A/en active Pending
- 2020-09-16 WO PCT/CN2020/115571 patent/WO2022056722A1/en active Application Filing
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| WO2012014348A1 (en) * | 2010-07-28 | 2012-02-02 | パナソニック株式会社 | Cell module and cell pack |
| JP2012079510A (en) * | 2010-09-30 | 2012-04-19 | Gs Yuasa Corp | Battery module and battery pack |
| JP2012094507A (en) * | 2010-09-30 | 2012-05-17 | Gs Yuasa Corp | Single battery, battery module, and battery pack |
| CN103931020A (en) * | 2011-11-11 | 2014-07-16 | 松下电器产业株式会社 | Battery pack |
| CN207868256U (en) * | 2017-10-26 | 2018-09-14 | 苏州宇量电池有限公司 | A kind of quick row pressure lithium battery with explosion-proof valve |
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| WO2022056722A1 (en) | 2022-03-24 |
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