CN219513197U - Battery pack, energy storage device and new energy equipment - Google Patents
Battery pack, energy storage device and new energy equipment Download PDFInfo
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- CN219513197U CN219513197U CN202320385206.5U CN202320385206U CN219513197U CN 219513197 U CN219513197 U CN 219513197U CN 202320385206 U CN202320385206 U CN 202320385206U CN 219513197 U CN219513197 U CN 219513197U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 255
- 238000001816 cooling Methods 0.000 claims abstract description 204
- 239000000110 cooling liquid Substances 0.000 claims abstract description 31
- 230000001681 protective effect Effects 0.000 claims abstract description 31
- 230000002159 abnormal effect Effects 0.000 claims description 14
- 230000000712 assembly Effects 0.000 claims description 11
- 238000000429 assembly Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 238000005507 spraying Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 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
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery pack, an energy storage device and new energy equipment. The battery pack comprises at least one battery module and a liquid cooling assembly, wherein the battery module comprises a protective shell and a plurality of electrically connected single batteries arranged in the protective shell; the liquid cooling assembly comprises at least one liquid cooling plate and at least one control valve, wherein the at least one liquid cooling plate is respectively adjacent to at least one single battery in the plurality of single batteries, the inside of the liquid cooling plate is hollow and is provided with a liquid inlet and a liquid outlet which are communicated with the inside of the liquid cooling plate, one control valve is connected with the at least one liquid inlet, and the control valve is used for controlling the opening of the liquid inlet so that cooling liquid enters the inside of the liquid cooling plate to cool the single battery adjacent to the liquid cooling plate or controlling the closing of the liquid inlet so as to prevent the cooling liquid from entering the inside of the liquid cooling plate. The battery pack provided by the utility model can be used for rapidly cooling the single battery, so that the risk of safety accidents is reduced.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery pack, an energy storage device and new energy equipment.
Background
The safety of the battery has been the most central problem. With the great use of batteries in various fields, the accidents of spontaneous combustion or ignition of the batteries are more and more increased, and the essential reasons of spontaneous combustion or ignition of the batteries are caused by thermal runaway of the batteries, and internal short circuits of the batteries, external heating or collision of the batteries and the like can cause the thermal runaway of the batteries.
Among the related art, the battery package includes battery module and spray set, and battery module includes the protective housing and sets up a plurality of battery cells in the protective housing, when battery cell leads to its thermal runaway because of the temperature rise, spray set can spray fire control gas or fire control liquid to battery module to reduce battery module's temperature, however, this kind of mode can't cool down battery cell fast, thereby can not in time obtain cooling down after leading to battery cell thermal runaway, and then easily causes the incident.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a battery pack, an energy storage device and new energy equipment, which can rapidly cool down a single battery so as to reduce the risk of safety accidents.
In order to solve the above technical problem, in a first aspect, the present utility model provides a battery pack comprising:
the battery module comprises a protective shell and a plurality of electrically connected single batteries arranged in the protective shell;
the liquid cooling assembly comprises at least one liquid cooling plate and at least one control valve, wherein at least one liquid cooling plate is respectively adjacent to at least one single battery among a plurality of single batteries, the liquid cooling plate is hollow in the interior and is provided with a liquid inlet and a liquid outlet which are communicated with the interior of the liquid cooling plate, one control valve is connected with at least one liquid inlet, and the control valve is used for controlling the opening of the liquid inlet so that cooling liquid enters the interior of the liquid cooling plate to cool the single battery adjacent to the liquid cooling plate or controlling the closing of the liquid inlet so as to prevent the cooling liquid from entering the interior of the liquid cooling plate.
Therefore, when at least one single battery is in thermal runaway, the control valve connected to the liquid inlet of the liquid cooling plate corresponding to the single battery in thermal runaway is opened, when the control valve is opened, the cooling liquid continuously enters the liquid cooling plate corresponding to the single battery in thermal runaway from the liquid inlet, so that the heat generated by the single battery in thermal runaway is absorbed, the cooling liquid absorbing the heat flows out through the liquid outlet, the purpose of reducing the temperature of the single battery in thermal runaway is achieved, the heat of the single battery in thermal runaway is prevented from being transferred to other normal single batteries, the risk that the whole battery pack is induced by the single battery in thermal runaway to cause fire explosion is avoided, and the safety of the battery pack is ensured. In addition, because at least one liquid cooling plate is respectively adjacent to at least one single battery in a plurality of single batteries, when the control valve is opened, the liquid cooling plate connected with the control valve can directly cool the corresponding single battery, and compared with the passive cooling of the whole battery module in a spraying mode in the related technology, the battery pack provided by the utility model can timely and rapidly accurately cool the single battery in thermal runaway when the single battery is in thermal runaway, thereby avoiding the diffusion of heat, solving the problem of thermal runaway from the source and further ensuring the safety of the battery pack.
In a possible implementation manner of the first aspect, the liquid cooling plate is disposed between at least two adjacent single cells in the plurality of single cells, and two opposite plate surfaces of the liquid cooling plate are respectively connected to side surfaces of the adjacent two single cells.
Because the liquid cooling plate sets up between two adjacent battery cells, consequently, the liquid cooling plate can insulate against heat two adjacent battery cells on the one hand to preliminary heat transfer between two adjacent battery cells of blocking, avoided the heating of thermal runaway battery cell to adjacent normal battery cell, on the other hand, the liquid cooling plate can cool down the battery cell of corresponding thermal runaway fast, thereby avoided the further intensification of thermal runaway battery to cause the fire or explode, further guaranteed the security of battery package. In addition, two opposite faces through the liquid cooling plate are respectively connected to the side faces of two adjacent single batteries, so that the cooling area of the liquid cooling plate to the single batteries can be increased, and the cooling efficiency of the liquid cooling plate to the single batteries is improved.
In a possible implementation manner of the first aspect, the liquid cooling plates are disposed between every two adjacent unit cells.
Therefore, when any single battery is in thermal runaway, the control valve at the liquid inlet of the liquid cooling plate connected with the side surface of the thermal runaway single battery can be opened, so that the liquid cooling plate can rapidly cool the thermal runaway single battery, and meanwhile, the liquid cooling plate and the liquid cooling plate adjacent to the liquid cooling plate can also insulate heat from the adjacent single battery, thereby ensuring the cooling effect of the thermal runaway single battery and ensuring the safety of a battery pack.
In a possible implementation manner of the first aspect, a plurality of the unit cells are sequentially arranged along a first direction;
at least one liquid cooling plate is arranged on the bottom surface of the single battery along the first direction, and the plate surface direction of the liquid cooling plate is parallel to the first direction.
Therefore, the cooling effect of the battery pack with shorter height can be guaranteed, and the increase of the interval between two adjacent single batteries can be avoided so as to reduce the energy density of the battery pack.
In a possible implementation manner of the first aspect, the liquid cooling assembly includes a plurality of liquid cooling plates, a plurality of liquid cooling plates are equal to a plurality of single batteries in number, and a plurality of liquid cooling plates are respectively and sequentially arranged on bottom surfaces of a plurality of single batteries along the first direction.
Therefore, when any single battery is out of control, the liquid inlet of the liquid cooling plate connected with the single battery in thermal control is controlled to be opened so as to cool the single battery in thermal control, and the liquid inlet of the liquid cooling plate of the adjacent single battery can be opened to avoid the temperature rise of the adjacent single battery in order to avoid the heat transfer of the single battery in thermal control to the adjacent single battery.
In a possible implementation manner of the first aspect, the liquid cooling assembly includes a plurality of liquid cooling plates and a plurality of control valves, the plurality of liquid cooling plates are equal to the plurality of control valves, and the plurality of control valves are respectively connected with liquid inlets of the plurality of liquid cooling plates.
Because the quantity of a plurality of control valves and a plurality of liquid cooling boards equals, consequently, the inlet of every liquid cooling board all is connected with the control valve, and consequently, when the thermal runaway takes place for arbitrary single battery, the inlet of the liquid cooling board that this single battery of accessible accurate control corresponds opens to make the liquid cooling board carry out the coolant circulation in order to cool down the single battery of thermal runaway, reduced the loss.
In a possible implementation manner of the first aspect, the battery pack includes a plurality of battery modules, and the plurality of battery modules are electrically connected to form a plurality of battery assemblies, and a plurality of liquid cooling plates are arranged in each battery assembly;
the liquid cooling assembly comprises a plurality of control valves, the control valves are equal to the battery assemblies in number, and the control valves are respectively connected with the liquid inlets of the liquid cooling plates in the battery assemblies.
Therefore, the structure can be suitable for the smaller structure setting of the battery pack, and meanwhile, the structure and control complexity of the liquid cooling assembly in the battery pack can be avoided.
In a possible implementation manner of the first aspect, a temperature detector is further disposed in the protective housing, and the temperature detector is configured to detect temperatures of a plurality of the unit cells;
the battery pack further comprises a BMS module, wherein the BMS module is respectively and electrically connected with at least one control valve and the temperature detector, and the BMS module is used for respectively controlling the opening or closing of at least one control valve according to the detection information of the temperature detector.
Therefore, when the temperature detector detects that one or more single batteries are out of control, the BMS module can timely control the control valve connected to the liquid inlet of the corresponding liquid cooling plate to be opened, so that cooling liquid enters the liquid cooling plate, and the temperature of the single batteries out of control is reduced. It can be seen that by providing the temperature detector and the BMS module, the degree of automation of the thermal safety protection of the battery pack can be improved, in other words, the initiative of the thermal safety protection of the battery pack is improved.
In a possible implementation manner of the first aspect, a gas detector electrically connected to the BMS module is disposed in the protective housing, the gas detector is configured to detect whether abnormal gas is generated in the protective housing, and the BMS module is further configured to control a plurality of control valves to be opened when abnormal gas is generated in the protective housing.
Therefore, when the gas detector detects that abnormal gas exists in the protective shell, the gas detector indicates that at least one single battery in the protective shell has the sign of ignition, so that the temperature in the protective shell needs to be quickly reduced to avoid causing serious safety accidents.
In a possible implementation manner of the first aspect, the battery pack further includes a relay, the relay is electrically connected to the BMS module and the plurality of unit batteries, respectively, and the BMS module is further configured to control the relay to be opened when at least one of the control valves is opened.
Because the relay is a control switch, therefore, through setting up the relay to make the relay be connected with BMS module and a plurality of battery cell electricity respectively, from this, when temperature detector and/or gas detector detected abnormal information, BMS module can control the relay and cut off the power of battery package, in order to make the battery package be in the outage state, further guaranteed the security of battery package.
In a second aspect, the present utility model also provides an energy storage device comprising:
a frame body;
the battery pack of the first aspect, wherein the battery pack is disposed in the frame;
the liquid cooler is arranged in the frame body and connected with the battery pack, and the liquid cooler is used for providing cooling liquid for the liquid cooler.
Therefore, when the single battery in the battery pack is in thermal runaway, the cooling liquid provided by the liquid cooling machine can enter the liquid cooling plate through the control valve, and the cooling liquid with absorbed heat can enter the liquid cooling machine through the liquid outlet, so that the cooling liquid with absorbed heat can be recovered to the initial temperature and conveyed into the liquid cooling plate again by the liquid cooling machine, the recycling of the cooling liquid is realized, and the energy waste is reduced.
In a third aspect, the present utility model also provides a new energy device, where the new energy device includes the energy storage apparatus according to the second aspect.
Since the new energy device in the third aspect includes the energy storage apparatus in the second aspect, the new energy device in the third aspect is better in safety.
Compared with the prior art, the utility model has at least the following beneficial effects:
in the utility model, when at least one single battery is in thermal runaway, the control valve connected to the liquid inlet of the liquid cooling plate corresponding to the single battery in thermal runaway is opened, and when the control valve is opened, the cooling liquid continuously enters the liquid cooling plate corresponding to the single battery in thermal runaway from the liquid inlet so as to absorb the heat generated by the single battery in thermal runaway, and the cooling liquid absorbing the heat flows out through the liquid outlet, thereby achieving the purpose of reducing the temperature of the single battery in thermal runaway, avoiding the heat transfer from the single battery in thermal runaway to other normal single batteries, further avoiding the risk that the whole battery pack is triggered by the single battery in thermal runaway to generate fire explosion, and ensuring the safety of the battery pack. In addition, because at least one liquid cooling plate is respectively adjacent to at least one single battery in a plurality of single batteries, when the control valve is opened, the liquid cooling plate connected with the control valve can directly cool the corresponding single battery, and compared with the passive cooling of the whole battery module in a spraying mode in the related technology, the battery pack provided by the utility model can timely and rapidly accurately cool the single battery in thermal runaway when the single battery is in thermal runaway, thereby avoiding the diffusion of heat, solving the problem of thermal runaway from the source and further ensuring the safety of the battery pack.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic three-dimensional structure of a battery pack according to an embodiment of the present utility model;
FIG. 2 is a schematic illustration of one configuration of a control valve arrangement provided in accordance with an embodiment of the present utility model;
FIG. 3 is a schematic view of one form of arrangement of the liquid cooling plates in the battery pack of FIG. 1;
FIG. 4 is a schematic view of another form of liquid cooling plate arrangement in the battery pack of FIG. 1;
fig. 5 is a schematic three-dimensional structure of another battery pack according to an embodiment of the present utility model;
FIG. 6 is a schematic illustration of another configuration of a control valve arrangement provided in accordance with an embodiment of the present utility model;
FIG. 7 is a schematic illustration of the electrical connection of the control valve of FIG. 2;
FIG. 8 is a schematic diagram of the electrical connection of the control valve of FIG. 6;
fig. 9 is a schematic three-dimensional structure of an energy storage device according to an embodiment of the present utility model;
fig. 10 is a schematic structural diagram of a new energy device according to an embodiment of the present utility model.
Reference numerals illustrate:
100-battery pack; 110-a battery module; 111-a protective shell; 112-single battery; 110 a-a battery assembly; 120-liquid cooling assembly; 121-a liquid cooling plate; 1211-a liquid inlet; 1212-a liquid outlet; 122-control valve; 131-a temperature detector; 132-BMS module; 133-a gas detector;
200-an energy storage device; 210-a frame body; 220-a liquid cooler;
300-new energy equipment.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
As described in the background art of the present utility model, in the related art, the battery pack includes a battery module and a spraying device, the battery module includes a protective housing and a plurality of unit batteries disposed in the protective housing, when the unit batteries are thermally out of control due to the temperature rise, the spraying device can spray fire-fighting gas or fire-fighting liquid to the battery module to reduce the temperature of the battery module, however, the manner cannot quickly cool the unit batteries, so that the unit batteries cannot be cooled in time after the thermal out of control, and further, safety accidents are easily caused.
In order to solve the technical problems mentioned in the background art, the utility model provides a battery pack, an energy storage device and new energy equipment, wherein the battery pack comprises at least one battery module and a liquid cooling assembly, the battery module comprises a protective shell and a plurality of single batteries which are arranged in the protective shell and are electrically connected in sequence, and the liquid cooling assembly comprises at least one liquid cooling plate and at least one control valve.
The utility model is illustrated in detail below by means of specific examples:
referring to fig. 1 and 2, an embodiment of the present utility model provides a battery pack 100, where the battery pack 100 includes at least one battery module 110 and a liquid cooling assembly 120, and the battery module 110 includes a protective shell 111 and a plurality of electrically connected unit batteries 112 disposed in the protective shell 111; the liquid cooling assembly 120 includes at least one liquid cooling plate 121 and at least one control valve 122, the at least one liquid cooling plate 121 is adjacent to at least one unit cell 112 of the plurality of unit cells 112, the interior of the liquid cooling plate 121 is hollow and has a liquid inlet 1211 and a liquid outlet 1212 communicating with the interior of the liquid cooling plate 121, one control valve 122 is connected with the at least one liquid inlet 1211, the control valve 122 is used for controlling the opening of the liquid inlet 1211 to enable the cooling liquid to enter the interior of the liquid cooling plate 121 to cool the unit cell 112 adjacent to the liquid cooling plate 121, or controlling the liquid inlet 1211 to be closed to prevent the cooling liquid from entering the interior of the liquid cooling plate 121.
The plurality of unit cells 112 refers to two or more unit cells 112. At least one liquid cooling plate 121 includes one liquid cooling plate 121 or two or more liquid cooling plates 121, for example, when the plurality of unit cells 112 is two, the liquid cooling plate 121 is one, the liquid cooling plate 121 may be disposed on one of any two unit cells 112, or the liquid cooling plate 121 may be disposed between two unit cells 112. The at least one control valve 122 means two or more control valves 122. The at least one liquid cooling plate 121 is disposed on at least one unit cell 112 of the plurality of unit cells 112, and it should be understood that one liquid cooling plate 121 is disposed on one or two unit cells 112, or the plurality of liquid cooling plates 121 are disposed on at least a portion of the plurality of unit cells 112, or when the plurality of liquid cooling plates 121 are equal to the plurality of unit cells 112, a liquid cooling plate 121 is disposed on each unit cell 112, or when one liquid cooling plate 121 is disposed between two adjacent unit cells 112, a liquid cooling plate 121 is disposed between each two adjacent liquid cooling plates 121.
Therefore, based on the above embodiment structure, when at least one of the unit cells 112 is thermally out of control, the control valve 122 connected to the liquid inlet 1211 of the liquid cooling plate 121 corresponding to the unit cell 112 is opened, and when the control valve 122 is opened, the cooling liquid continuously enters the liquid cooling plate 121 corresponding to the unit cell 112 from the liquid inlet 1211 to absorb the heat generated by the unit cell 112, and the cooling liquid absorbing the heat flows out through the liquid outlet 1212, thereby achieving the purpose of reducing the temperature of the unit cell 112, avoiding the heat transfer from the unit cell 112 to other normal unit cells 112, further avoiding the risk that the whole battery pack 100 is triggered to generate fire explosion by the unit cell 112, and ensuring the safety of the battery pack 100. In addition, since the at least one liquid cooling plate 121 is disposed on the at least one single cell 112 of the plurality of single cells 112, when the control valve 122 is opened, the liquid cooling plate 121 connected with the control valve 122 can directly cool the corresponding single cell 112, compared with the cooling of the whole battery module 110 passively by spraying in the related art, the battery pack 100 provided in this embodiment can accurately cool the single cell 112 in time and rapidly when the single cell 112 is in thermal runaway, thereby avoiding the diffusion of heat, solving the problem of thermal runaway from the source and further ensuring the safety of the battery pack 100.
Note that, the control valve 122 may be a valve such as a solenoid valve or a hydraulic valve that can control the opening or closing of the liquid inlet 1211.
In some possible embodiments, referring to fig. 3 and 4 in combination, a liquid cooling plate 121 is disposed between at least two adjacent unit cells 112 in the plurality of unit cells 112, and two opposite plate surfaces of the liquid cooling plate 121 are respectively connected to side surfaces of the adjacent unit cells 112.
The side surface of the unit cell 112 refers to the surface of the unit cell 112 having the largest area, and the unit cell 112 has six surfaces as shown in fig. 1, for example, a square cell, and the side surface refers to the surface indicated by an arrow a in fig. 1.
Because the liquid cooling plate 121 sets up between two adjacent battery cells 112, consequently, on the one hand liquid cooling plate 121 can insulate against heat to two adjacent battery cells 112 to preliminary heat transfer between two adjacent battery cells 112 is blocked, the heating of thermal runaway battery cell 112 to adjacent normal battery cell 112 has been avoided, on the other hand liquid cooling plate 121 can cool down to the battery cell 112 that corresponds thermal runaway fast, thereby avoided the further intensification of thermal runaway battery to cause the fire or explode, further guaranteed the security of battery package 100. In addition, the two opposite plate surfaces of the liquid cooling plate 121 are respectively connected to the side surfaces of two adjacent single batteries 112, so that the cooling area of the liquid cooling plate 121 to the single batteries 112 can be increased, and the cooling efficiency of the liquid cooling plate 121 to the single batteries 112 is improved.
It should be further noted that, a liquid cooling plate 121 is disposed between at least two adjacent unit cells 112 in the plurality of unit cells 112, and it should be understood that, as shown in fig. 3, a liquid cooling plate 121 is disposed between each two adjacent unit cells 112, or, as shown in fig. 4, a liquid cooling plate 121 is disposed between each two adjacent unit cells 112, or, a liquid cooling plate 121 is disposed between some two adjacent unit cells 112, and a liquid cooling plate 121 is disposed between each two adjacent unit cells 112 will be described in detail below.
In view of the risk of thermal runaway that may occur between the plurality of unit cells 112 included in the battery module 110, in order to be able to precisely cool each of the unit cells 112, in some possible embodiments, as shown in fig. 3, a liquid cooling plate 121 is provided between every two adjacent unit cells 112.
Therefore, when any one of the unit batteries 112 is in thermal runaway, the control valve 122 at the liquid inlet 1211 of the liquid cooling plate 121 connected with the side surface of the thermal runaway unit battery 112 can be opened, so that the liquid cooling plate 121 can rapidly cool the thermal runaway unit battery 112, and meanwhile, the liquid cooling plate 121 and the liquid cooling plate 121 adjacent to the liquid cooling plate 121 can insulate heat from the adjacent unit battery 112, thereby ensuring the cooling effect of the thermal runaway unit battery 112 and the safety of the battery pack 100.
Of course, the connection between the liquid cooling plate 121 and the unit cells 112 is not limited to the above connection, and in other possible embodiments, the plurality of unit cells 112 are sequentially arranged along the first direction (i.e. the direction indicated by the X arrow in fig. 5); at least one liquid cooling plate 121 is sequentially disposed on the bottom surface of at least part of the single batteries 112 along the first direction, and the plate surface direction of the liquid cooling plate 121 is parallel to the first direction.
The bottom surface of the unit cell 112 is a wall surface perpendicular to the side surface of the unit cell 112 and located under gravity when the battery pack 100 is placed.
When the height of the unit cell 112 is shorter, that is, when the battery pack 100 is placed, the height of the unit cell 112 is lower in the gravity direction, and the interval between two adjacent unit cells 112 is smaller, in order to effectively cool the battery pack 100 with the middle structure, the structure in the embodiment is adopted, that is, the plurality of liquid cooling plates 121 are arranged on the bottom surface of a part of the unit cells 112 along the first direction, thereby not only ensuring the cooling effect of the battery pack 100 with the structure, but also avoiding increasing the interval between two adjacent unit cells 112 to reduce the energy density of the battery pack 100.
It should be further noted that, the plurality of liquid cooling plates 121 are disposed on the bottom surfaces of at least some of the unit cells 112 along the first direction in sequence, and it should be understood that one liquid cooling plate 121 is disposed on the bottom surface of each unit cell 112, or the plurality of liquid cooling plates 121 are disposed at intervals, that is, the liquid cooling plates 121 are disposed on two unit cells 112 of the adjacent three unit cells 112 respectively.
Considering that the liquid cooling plate 121 can accurately cool each single battery 112, in some possible embodiments, the liquid cooling assembly 120 includes a plurality of liquid cooling plates 121, the plurality of liquid cooling plates 121 are equal to the plurality of single batteries 112, and the plurality of liquid cooling plates 121 are sequentially disposed on the bottom surfaces of the plurality of single batteries 112 along the first direction.
Therefore, when any one of the unit cells 112 is out of control, the liquid inlet 1211 of the liquid cooling plate 121 connected to the unit cell 112 is controlled to be opened to cool the unit cell 112 in thermal control, and of course, when the unit cell 112 in thermal control transfers heat to the adjacent unit cell 112, the liquid inlet 1211 of the liquid cooling plate 121 of the adjacent unit cell 112 is opened to avoid the adjacent unit cell 112 from raising temperature.
In some possible embodiments, referring to fig. 2, the liquid cooling assembly 120 includes a plurality of control valves 122 and a plurality of liquid cooling plates 121, the plurality of control valves 122 are equal in number to the plurality of liquid cooling plates 121, and the plurality of control valves 122 are respectively connected to liquid inlets 1211 of the plurality of liquid cooling plates 121.
Since the number of the control valves 122 is equal to that of the plurality of liquid cooling plates 121, the liquid inlet 1211 of each liquid cooling plate 121 is connected with the control valve 122, so that when any one of the unit batteries 112 is out of control, the liquid inlet 1211 of the corresponding liquid cooling plate 121 of the unit battery 112 can be accurately controlled to be opened, and the liquid cooling plate 121 can circulate cooling liquid to cool the unit battery 112 out of control, thereby reducing loss.
In some possible embodiments, referring to fig. 6, the battery pack 100 includes a plurality of battery modules 110, the plurality of battery modules 110 are electrically connected to form a plurality of battery assemblies 110a, a plurality of liquid cooling plates 121 are disposed in each battery assembly 110a, the liquid cooling assembly 120 includes a plurality of control valves 122, the plurality of control valves 122 are equal to the plurality of battery assemblies 110a, and the plurality of control valves 122 are respectively connected to the liquid inlets 1211 of the plurality of liquid cooling plates 121 in the plurality of battery assemblies 110 a.
When the battery pack 100 in the above-mentioned structure is small, in order to avoid complicating the structure and control of the liquid cooling assembly 120 in the battery pack 100, the structure in this embodiment is adopted, that is, the number of the plurality of control valves 122 is equal to the number of the plurality of battery assemblies 110a, each control valve 122 is respectively connected with the liquid inlet 1211 of the plurality of liquid cooling plates 121 in the plurality of battery assemblies 110a, and therefore, when a thermal runaway occurs in one battery assembly 110a, the liquid inlet 1211 of the plurality of liquid cooling plates 121 in the battery assembly 110a can be opened by controlling the control valve 122, so that the temperature of the plurality of battery modules 110 in the battery assembly 110a is reduced, and the safety of the battery assembly 110a is further ensured.
In some possible embodiments, a temperature detector 131 is further disposed in the protective case 111, and the temperature detector 131 is configured to detect the temperatures of the plurality of unit cells 112; the battery pack 100 further includes a BMS (battery management system) module 132, wherein the BMS module 132 is electrically connected to the at least one control valve 122 and the temperature detector 131, and the BMS module 132 is configured to control the at least one control valve 122 to be opened or closed according to detection information of the temperature detector 131.
Thus, when the temperature detector 131 detects that one or more of the unit batteries 112 is thermally out-of-control, the BMS module 132 can timely control the control valve 122 connected to the liquid inlet 1211 of the corresponding liquid cooling plate 121 to be opened so that the cooling liquid enters the inside of the liquid cooling plate 121, thereby cooling the thermally out-of-control unit battery 112.
For example, the unit batteries 100 include five unit batteries 112 sequentially arranged along the first direction, and the unit batteries 112 numbered 1 and the unit batteries 112 numbered 2 and … … are sequentially provided for the unit batteries 112 numbered 5, the liquid cooling plate 121 includes four liquid cooling plates 121, two opposite plate surfaces of the four liquid cooling plates 121 are respectively connected with the side surfaces of every two adjacent unit batteries 112, the control valve 122 also includes four liquid cooling plates 122, and the four control valves 122 are respectively connected to the liquid inlet 1211 of the four liquid cooling plates 121.
It can be seen that by providing the temperature detector 131 and the BMS module 132, the degree of automation of the thermal safety protection of the battery pack 100, in other words, the initiative of the thermal safety protection of the battery pack 100 can be improved.
The temperature detector 131 may be a temperature sensor, an infrared light temperature detector, or the like that can detect temperature.
When the temperature of the thermal runaway unit cells 112 rises too fast to cause a fire, abnormal gas will be emitted, in which case, in order to be able to reduce the temperature in the battery pack 100 as quickly as possible, in some possible embodiments, a gas detector 133 electrically connected to the BMS module 132 is provided in the protective case 111, the gas detector 133 being used to detect whether abnormal gas is generated in the protective case 111, and the BMS module 132 being further used to control the plurality of control valves 122 to be opened when abnormal gas is generated in the protective case 111.
Therefore, when the gas detector 133 detects that the protection shell 111 has abnormal gas, it indicates that at least one single battery 112 in the protection shell 111 has ignited, so that the temperature in the protection shell 111 needs to be quickly reduced to avoid causing serious safety accidents, based on this, the gas detector 133 and the BMS module 132 are electrically connected, and when the protection shell 111 has abnormal gas, the BMS module 132 can control the plurality of control valves 122 to be fully opened, so as to achieve the effect of accelerating the temperature reduction, avoid heat diffusion, and greatly provide the safety of the battery pack 100.
The gas detector 133 may be a gas detector, or the like.
Since the battery pack 100 is used to store electric energy to supply electric power to the electric devices, however, when at least one unit cell 112 in the battery pack 100 is thermally out of control or starts to catch fire, the battery pack 100 is powered off, and in some possible embodiments, the battery pack 100 further includes a relay (not shown) electrically connected to the BMS module 132 and the plurality of unit cells 112, respectively, and the BMS module 132 is further used to control the relay to be powered off when the at least one control valve 122 is opened.
Since the relay is a control switch, the relay is provided and electrically connected to the BMS module 132 and the plurality of unit cells 112, respectively, so that when the temperature detector 131 and/or the gas detector 133 detect abnormal information (the abnormal information means that the temperature of one or a part of the unit cells 112 is significantly increased, or abnormal gas occurs in the protective case 111), the BMS module 132 can control the relay to cut off the power of the battery pack 100, thereby enabling the battery pack 100 to be in a power-off state, and further ensuring the safety of the battery pack 100.
Referring to fig. 9, the embodiment of the utility model further provides an energy storage device 200, where the energy storage device 200 includes a frame 210, a battery pack 100, and a liquid cooling machine 220, and the battery pack 100 is disposed in the frame 210; the liquid cooler 220 is disposed in the frame 210 and connected to the battery pack 100, and the liquid cooler 220 is configured to supply a cooling liquid to the liquid cooling plate 121.
Based on the structure in this embodiment, when thermal runaway occurs in the unit cell 112 in the battery pack 100, the cooling liquid provided by the liquid cooling machine 220 can enter the liquid cooling plate 121 through the control valve 122, and the cooling liquid with absorbed heat can enter the liquid cooling machine 220 through the liquid outlet 1212, so that the cooling liquid with absorbed heat can be cooled by the liquid cooling machine 220, the cooling liquid with absorbed heat is recovered to the initial temperature and is conveyed into the liquid cooling plate 121 again by the liquid cooling machine 220, thereby realizing the recycling of the cooling liquid and reducing the energy waste.
In addition, the liquid cooler 220 can reduce the temperature of the cooling liquid to 5-15 ℃ in the full power state, the liquid cooler 220 can not control the temperature of the cooling liquid to 15-20 ℃ in the full power state, but when the single battery 112 has a sign of ignition, the liquid cooler 220 works in full power, so that the cooling effect and the cooling efficiency of the liquid cooling plate 121 on the single battery 112 are ensured.
In addition, the battery pack 100 in this embodiment may have the same structure as any one of the battery packs 100 in the above embodiments, and may bring about the same or similar beneficial effects, and specifically, reference may be made to the description in the above embodiments, which are not repeated herein.
It should be noted that, the energy storage device 200 may be a new energy battery or an energy storage battery.
Referring to fig. 10, the embodiment of the present utility model further provides a new energy device 300, where the new energy device 300 includes the energy storage apparatus 200.
The energy storage device 200 in this embodiment may have the same structure as the energy storage device 200, and may bring about the same or similar beneficial effects, and the description in the above embodiment may be referred to specifically, which is not repeated herein.
Since the new energy device 300 in the present embodiment includes the energy storage apparatus 200 in the above embodiment, the new energy device 300 in the present embodiment has better safety.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (12)
1. A battery pack, comprising:
the battery module comprises a protective shell and a plurality of electrically connected single batteries arranged in the protective shell;
the liquid cooling assembly comprises at least one liquid cooling plate and at least one control valve, wherein at least one liquid cooling plate is respectively adjacent to at least one single battery in a plurality of single batteries, the liquid cooling plate is hollow and is provided with a liquid inlet and a liquid outlet which are communicated with the liquid cooling plate, one control valve is connected with at least one liquid inlet, and the control valve is used for controlling the opening of the liquid inlet so that cooling liquid enters the liquid cooling plate to cool the single battery adjacent to the liquid cooling plate or controlling the closing of the liquid inlet so as to prevent the cooling liquid from entering the liquid cooling plate.
2. The battery pack according to claim 1, wherein the liquid cooling plate is provided between at least two adjacent unit cells among the plurality of unit cells, and two opposite plate surfaces of the liquid cooling plate are respectively connected to side surfaces of the adjacent two unit cells.
3. The battery pack according to claim 2, wherein the liquid cooling plate is provided between each two adjacent unit cells.
4. The battery pack according to claim 1, wherein a plurality of the unit cells are arranged in order in the first direction;
at least one liquid cooling plate is arranged on the bottom surface of the single battery along the first direction, and the plate surface direction of the liquid cooling plate is parallel to the first direction.
5. The battery pack according to claim 4, wherein the liquid cooling assembly comprises a plurality of liquid cooling plates, the plurality of liquid cooling plates are equal to the plurality of single batteries in number, and the plurality of liquid cooling plates are sequentially and respectively arranged on the bottom surfaces of the plurality of single batteries along the first direction.
6. The battery pack of claim 1, wherein the liquid cooling assembly comprises a plurality of liquid cooling plates and a plurality of control valves, the plurality of liquid cooling plates and the plurality of control valves are equal in number, and the plurality of control valves are respectively connected with liquid inlets of the plurality of liquid cooling plates.
7. The battery pack according to claim 1, wherein the battery pack comprises a plurality of battery modules, the plurality of battery modules are electrically connected to form a plurality of battery assemblies, and a plurality of liquid cooling plates are arranged in each battery assembly;
the liquid cooling assembly comprises a plurality of control valves, the control valves are equal to the battery assemblies in number, and the control valves are respectively connected with the liquid inlets of the liquid cooling plates in the battery assemblies.
8. The battery pack according to any one of claims 1 to 7, wherein,
a temperature detector is further arranged in the protective shell and is used for detecting the temperatures of the plurality of single batteries;
the battery pack further comprises a BMS module, wherein the BMS module is respectively and electrically connected with at least one control valve and the temperature detector, and the BMS module is used for controlling the opening or closing of at least one control valve according to the detection information of the temperature detector.
9. The battery pack of claim 8, wherein a gas detector electrically connected to the BMS module is provided in the protective case, the gas detector being for detecting whether abnormal gas is generated in the protective case;
the BMS module is also used for controlling a plurality of control valves to open when abnormal gas is generated in the protective shell.
10. The battery pack of claim 8, further comprising a relay electrically connected to the BMS module and the plurality of battery cells, respectively, the BMS module further configured to control the relay to open when at least one of the control valves is open.
11. An energy storage device, comprising:
a frame body;
the battery pack of any one of claims 1-10, disposed within the housing;
the liquid cooler is arranged in the frame body and connected with the battery pack, and the liquid cooler is used for providing cooling liquid for the liquid cooler.
12. A new energy device comprising the energy storage apparatus of claim 11.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320385206.5U CN219513197U (en) | 2023-03-03 | 2023-03-03 | Battery pack, energy storage device and new energy equipment |
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| CN202320385206.5U CN219513197U (en) | 2023-03-03 | 2023-03-03 | Battery pack, energy storage device and new energy equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116231172A (en) * | 2022-12-27 | 2023-06-06 | 重庆三峡时代能源科技有限公司 | Battery heat management method, device, equipment and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116231172A (en) * | 2022-12-27 | 2023-06-06 | 重庆三峡时代能源科技有限公司 | Battery heat management method, device, equipment and storage medium |
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