CN219658794U - Battery, battery pack, energy storage system and electric automobile - Google Patents

Abstract

The utility model provides a battery, a battery pack, an energy storage system and an electric automobile, comprising: the battery comprises a battery shell, an upper cover plate, a lower cover plate, a plurality of battery cells, a plurality of first liquid cooling plates and a plurality of second liquid cooling plates; through setting up first liquid cooling board between adjacent electric core, can play better radiating effect to the electric core, and through the second liquid cooling board that sets up in lower apron below, every first liquid cooling board can run through the apron down after with the contact of second liquid cooling board, and first liquid cooling board is after having absorbed the heat that the electric core produced, the accessible accomplishes the heat exchange after contacting with the second liquid cooling board. So, battery overall structure can make thickness, and the electric core of internal design can divide the chamber to set up the multilayer, has both increased the energy density of battery, avoids appearing the heat dissipation problem again, arranges the electric core between with first liquid cooling board, has promoted electric core heat exchange efficiency, and benefited by the contact of bottom second liquid cooling board and a plurality of first liquid cooling board, and the battery can maintain at suitable operating temperature, improves battery life.

Description

Battery, battery pack, energy storage system and electric automobile

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery, a battery pack, an energy storage system and an electric automobile.

Background

Along with the development of battery technology, applications of various batteries in the fields of communication power supplies, data centers, micro-grid energy storage, electric vehicles and the like are wider and wider, the capacity of each battery is designed to be higher and the various combinations of an energy storage system are more and more complex, and the heat dissipation difficulty of each battery core in each battery cell is higher.

In view of the foregoing, it is desirable to provide a simple and reliable battery structure, so as to effectively improve the heat dissipation capability of the internal battery cells of the battery.

Disclosure of Invention

The utility model provides a battery, a battery pack, an energy storage system and an electric automobile, which can effectively improve the heat dissipation capacity of an electric core in the battery.

In a first aspect, the present utility model provides a battery comprising: the battery comprises a battery shell, an upper cover plate, a lower cover plate, a plurality of battery cells, a plurality of first liquid cooling plates and a plurality of second liquid cooling plates; a first heat exchange medium is arranged in each first liquid cooling plate, and a second heat exchange medium is arranged in each second liquid cooling plate;

the battery shell, the upper cover plate and the lower cover plate form an accommodating space, and a plurality of battery cores are arranged in the accommodating space; the plurality of electric cores are connected in parallel along the radial direction of the battery shell, and one first liquid cooling plate is arranged between two adjacent electric cores; the upper cover plate is provided with a pole, the pole is connected with each of the plurality of electric cores, the second liquid cooling plate is arranged outside the accommodating space and below the lower cover plate, and each first liquid cooling plate penetrates through the lower cover plate to be in contact with the second liquid cooling plate; after each first liquid cooling plate is contacted with the second liquid cooling plate, the first heat exchange medium and the second heat exchange medium are subjected to heat exchange.

According to the battery structure provided by the utility model, the battery can be thick, the battery core which is internally designed can be provided with multiple layers in a cavity, so that the density of the battery is increased, the problem of low heat dissipation capacity is avoided, the first liquid cooling plates are arranged between the battery cores, the heat exchange efficiency of the battery core is improved, and the battery can maintain proper working temperature due to the contact between the bottom second liquid cooling plates and the plurality of first liquid cooling plates, and the service life of the battery is prolonged.

In order to further improve heat dissipation capacity, as a possible implementation manner, one side, close to the second liquid cooling plate, of each first liquid cooling plate is provided with at least one liquid cooling through hole, the first liquid cooling plate is communicated with the second liquid cooling plate through the at least one liquid cooling through hole, and the first heat exchange medium and the second heat exchange medium circulate through the at least one liquid cooling through hole.

The second heat exchange medium in the second liquid cooling plate is sucked into the first liquid cooling plate through the liquid cooling through holes by the capillary phenomenon of the capillary guide pipe so as to realize the circulation of the heat exchange medium in the first liquid cooling plate. With the operation of the battery, a large amount of waste heat is generated by the internal battery core, heat generated by the battery core is absorbed by a first heat exchange medium in the first liquid cooling plate, and the heat of the first heat exchange medium is taken away by a second heat exchange medium absorbed by the battery core. Through the setting of capillary duct, let second heat transfer medium can pour into a plurality of capillary ducts in the first liquid cooling board through capillary phenomenon is automatic, outside only needs a less water pump of power just can realize heat transfer medium's circulation, lets whole battery structure compacter when having saved the space.

As a possible implementation manner, a first liquid cooling channel is arranged in each first liquid cooling plate, and one side, close to the second liquid cooling plate, of each first liquid cooling plate is provided with at least one first liquid cooling through hole communicated with the first liquid cooling channel; the second liquid cooling plates are internally provided with second liquid cooling channels, and one side, close to the first liquid cooling plates, of each second liquid cooling plate is provided with at least one second liquid cooling through hole communicated with the second liquid cooling channels; the first heat exchange medium and the second heat exchange medium circulate through the first liquid cooling passage, the at least one first liquid cooling through hole, the at least one second liquid cooling through hole and the second liquid cooling passage.

The U-shaped liquid cooling passage is formed by connecting a plurality of parallel U-shaped flow channels in series, a first heat exchange medium entering the interior through the liquid inlet enters the U-shaped liquid cooling passage to circularly flow and exchange heat with the battery core, and then enters the second liquid cooling plate through the liquid outlet, so that the flow resistance can be effectively reduced, the uniformity of flow is ensured, and the cooling and heat dissipation efficiency is effectively improved.

As a possible embodiment, the second liquid cooling passage in the second liquid cooling plate is further connected to an external cold source for circulating the cooled second heat exchange medium to the second liquid cooling passage.

The external cold source can enable heat generated by the battery core to be conveyed to the outside of the battery so as to conduct liquid cooling heat dissipation on the battery, in addition, the external cold source can convey the cooled second heat exchange medium into the second liquid cooling plate, and the second heat exchange medium can be ensured to take away the heat generated by the battery core.

As one possible implementation, the external heat sink includes a radiator and a cooling fan; the radiator is communicated with the second liquid cooling passage, and the cooling fan is used for cooling the second heat exchange medium flowing through the radiator by using sucked air.

By way of example, the heat sink may be a finned tube heat sink, which may be an aluminum corrugated fin, and the cooling fan draws ambient air into the finned tube heat sink to reduce the temperature of the second heat exchange medium. In addition, the external cold source can also adjust the cooling fan rotating speed according to the temperature of the battery, and the higher the temperature of the battery is, the faster the cooling fan rotating speed is.

As a possible implementation manner, the battery further comprises a compression refrigeration module, wherein the compression refrigeration module comprises the following components: a heat exchanger, a compressor, a condenser, and a circulation pump; the circulating pump is used for driving the second heat exchange medium to circularly flow in the second liquid cooling plate; the compressor is used for: compressing the second heat exchange medium into a high pressure gaseous state; the condenser is used for: and gasifying the second heat exchange medium by absorbing heat in the air or condensing and cooling the compressed second heat exchange medium.

As a possible embodiment, a sealing material may be further disposed at a contact portion of each of the first liquid cooling plates and the second liquid cooling plates. In order to prevent the heat exchange medium from flowing out, the contact part between the first liquid cooling plate and the second liquid cooling plate can be sealed in a glue filling mode to avoid gaps, so that the airtight sealing between the first liquid cooling plate and the second liquid cooling plate is ensured, and meanwhile, the stability of the first liquid cooling plate and the second liquid cooling plate is further enhanced.

As a possible implementation manner, a plurality of high-temperature cracking holes can be further formed in the outer wall of each first liquid cooling plate, and when the surface temperature of the first liquid cooling plate exceeds a set temperature threshold value, at least one high-temperature cracking hole can be cracked so that the first heat exchange medium can be sprayed into the accommodating space. Like this, when the electric core takes place thermal runaway, leads to the surface temperature of first liquid cooling board to surpass the settlement temperature threshold value, high temperature fracture hole can break automatically, and first heat transfer medium sprays the accommodation space inside from the high temperature fracture hole to can cool off the battery in time, restrain the inside thermal runaway process of battery.

As a possible embodiment, the first heat exchange medium may be perfluoro hexanone. Wherein, the heat can be taken away in the quick vaporization of perfluoro-hexanone after meeting heat to make the whole temperature of battery drop, fire can extinguish naturally, and the perfluoro-hexanone can form the isolation layer after spraying accommodation space inside, isolation layer isolated electric core and oxygen, thereby also can extinguish the fire fast.

In a second aspect, the present utility model provides a battery pack comprising a battery management unit and the battery provided in the first aspect; the battery management unit is electrically connected with the battery and is used for acquiring parameter information of the battery and sending control information to the battery. Since the battery in the first aspect has the corresponding technical effects, the battery pack provided herein also has the corresponding technical effects, and the discussion will not be repeated.

In a third aspect, the present utility model provides an energy storage system, including an energy storage converter and a battery pack provided in the second aspect, where the energy storage converter is connected with a battery management unit through signals, so as to process a current input into the battery. Since the battery in the first aspect has corresponding technical effects, the energy storage system provided herein also has corresponding technical effects, and the discussion will not be repeated.

In a fourth aspect, the present utility model provides an electric vehicle, including a vehicle body and the energy storage system described in the third aspect, where the vehicle body has a power module, and the energy storage system is used to supply power to the power module. Since the battery in the first aspect has corresponding technical effects, the electric vehicle provided herein also has corresponding technical effects, and the discussion will not be repeated.

Drawings

FIG. 1A is a schematic diagram of a battery;

FIG. 1B is a schematic diagram of a battery;

fig. 1C is a schematic diagram of a third battery structure;

fig. 2 is a schematic perspective view of a battery;

fig. 3 is a schematic diagram showing a three-dimensional structure of a battery;

FIG. 4 is a schematic cross-sectional view of a first liquid cooling plate;

fig. 5 is a schematic perspective view of a third embodiment of a battery;

fig. 6 is a schematic structural diagram of an electric vehicle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. The words expressing the positions and directions described in the present utility model are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present utility model. The drawings of the present utility model are merely schematic representations of relative positional relationships and are not intended to represent true proportions.

In the description of the present utility model, "at least one" means one or more, wherein a plurality means two or more. In view of this, the term "plurality" may also be understood as "at least two" in embodiments of the present utility model. In addition, it should be understood that in the description of the present utility model, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not for indicating or implying any relative importance or order.

It should be noted that in embodiments of the present utility model, "connected" may refer to an electrical connection, and two electrical components may be connected directly or indirectly between two electrical components. For example, a may be directly connected to B, or indirectly connected to B through one or more other electrical components, for example, a may be directly connected to B, or directly connected to C, and C may be directly connected to B, where a and B are connected through C.

Along with the increasing design of battery monomer capacity, the volume of the battery can also be increased, and the problem of uneven heat distribution of the battery core can be more and more obvious after the volume of the battery is increased due to different heat dissipation coefficients of the battery core in the lithium battery, and the heat dissipation of the central part of the battery core is particularly difficult, so that local hot spots are easy to form during practical application, and the service life of the battery is further reduced.

In view of this, the present utility model provides a battery structure capable of effectively improving the heat dissipation capability of the internal battery cells of the battery.

Referring to fig. 1A, a schematic diagram of a battery according to an embodiment of the utility model is shown, wherein a battery 100 includes a battery housing 101, an upper cover 102, a lower cover 103, a plurality of electric cells 104, a plurality of first liquid cooling plates 105, and a second liquid cooling plate 106; a first heat exchange medium is disposed in each first liquid cooling plate 105, and a second heat exchange medium is disposed in the second liquid cooling plate 106.

The battery shell 101, the upper cover plate 102 and the lower cover plate 103 form an accommodating space, a plurality of battery cells 104 are arranged in the accommodating space, the battery cells 104 are connected in parallel along the radial direction of the battery shell 101, and a first liquid cooling plate is arranged between two adjacent battery cells 104; the upper cover plate 102 is provided with a pole 107, the pole 107 is respectively connected with each electric core 104 in the plurality of electric cores 104, the second liquid cooling plate 106 is arranged outside the accommodating space and below the lower cover plate 103, and each first liquid cooling plate 105 penetrates through the lower cover plate 103 and then contacts with the second liquid cooling plate 106; each of the first liquid cooling plates 105 may perform heat exchange with the first heat exchange medium and the second heat exchange medium after contacting with the second liquid cooling plate 106.

The battery case 101, the upper cover plate 102, and the lower cover plate 103 may be made of a metal material such as aluminum or an aluminum alloy, and the upper cover plate 102, the lower cover plate 103, and the battery case 101 may be sealed by laser welding. The upper cover plate 102 is provided with a through hole for penetrating the pole 107, the pole 107 may specifically include a positive pole ear and a negative pole ear, and the pole 107 may be installed on the upper cover plate 102 through the through hole on the upper cover plate 102 and connected with the multiple electric cores 104 respectively, so as to complete charging and discharging of the electric cores. The current collector corresponding to the positive electrode tab may be an aluminum (Al) foil or the like, and the current collector of the negative electrode tab may be a copper (Cu) foil or the like. The current collector materials of the positive electrode tab and the negative electrode tab are not particularly limited in the embodiment of the utility model. If the battery cell 104 is a sodium ion battery cell, the materials of the positive electrode lug and the negative electrode lug can be aluminum, so that the welding difficulty is reduced, the welding effect is ensured, the material cost and the manufacturing process can be saved, and the manufacturing efficiency is improved.

The battery cells 104 may be rectangular and have a relatively thin thickness, at least two battery cells 104 are stacked in sequence along a radial direction of the battery case 101, the radial direction being an X-axis direction in fig. 1A, and the plurality of battery cells 104 are connected in parallel. It should be noted that the cells may be stacked in the thickness direction of the cells, and in fig. 1A, the radial direction and the thickness direction are the same.

Referring to fig. 2, a schematic diagram of a three-dimensional structure of a battery is shown; the first liquid cooling plate 105 is arranged between two adjacent electric cores 104, and the heat dissipation effect of the first liquid cooling plate 105 arranged between the two adjacent electric cores 104 on the electric cores 104 is better due to the fact that the contact area between the first liquid cooling plate 105 and the two electric cores 104 is larger. And the second liquid cooling plates 106 are arranged outside the accommodating space and below the lower cover plate 103, each first liquid cooling plate 105 penetrates through the lower cover plate 103 and then contacts with the second liquid cooling plate 106, and after the first liquid cooling plate 105 absorbs heat generated by the battery core, heat exchange can be completed through contact with the second liquid cooling plate 106.

After one contact surface of each electric core 104 contacts with the first liquid cooling plate 105, each electric core 104 can exchange heat with the first liquid cooling plate 105. The area of contact of each cell 104 with the first liquid cooling plate 105 may be substantially the same, which allows the first liquid cooling plate 105 to maintain substantially uniform temperature effects on each cell 104. The surface of the battery cell 104 in contact with the first liquid cooling plate 105 may be the largest surface of the battery cell 104, so that the heat dissipation effect may be better improved.

Any one of the plurality of battery cells 104 may be formed by pre-pressing and shaping a basic structure formed by assembling the positive electrode plate, the negative electrode plate and the diaphragm in a winding manner, and by way of example, the basic structure formed by assembling the positive electrode plate, the negative electrode plate and the diaphragm may be shaped in a hot pressing or cold pressing manner, and then the shaped basic structure is laminated on a template in a winding manner, and the basic structure on the template is shaped under a set pressure and a template temperature, thereby the battery cell 104 may be obtained.

The battery cells 104 are disposed in the accommodating space formed by the battery case 101, the upper cover plate 102 and the lower cover plate 103, and the inside of the accommodating space is usually provided with electrolyte and other mediums to ensure the normal charge and discharge functions of the battery cells 104.

A plurality of liquid cooling through holes can be further formed in one side, close to the second liquid cooling plate 106, of the first liquid cooling plate 105, so that a second heat exchange medium in the second liquid cooling plate 106 can circulate to the first liquid cooling plate through the plurality of liquid cooling through holes to complete heat exchange. Referring to fig. 1B, a second schematic structural diagram of a battery according to an embodiment of the utility model is shown; the first liquid cooling plate 105 may be provided with a plurality of liquid cooling through holes, the plurality of liquid cooling through holes on the first liquid cooling plate 105 are communicated with the liquid cooling channels in the first liquid cooling plate 105, the second liquid cooling plate 106 is also provided with a plurality of liquid cooling through holes, the plurality of liquid cooling through holes on the second liquid cooling plate 106 are communicated with the liquid cooling channels in the second liquid cooling plate 106, the plurality of liquid cooling through holes on the first liquid cooling plate 105 are connected with the plurality of liquid cooling through holes on the second liquid cooling plate 106, the liquid cooling channels on the first liquid cooling plate 105 are communicated with the liquid cooling channels on the second liquid cooling plate 106, the first heat exchange medium in the liquid cooling channels on the first liquid cooling plate 105 is circulated to the liquid cooling channels on the second liquid cooling plate 106 through the communicated liquid cooling through holes, and the second heat exchange medium in the liquid cooling channels on the second liquid cooling plate 106 is circulated to the liquid cooling channels on the first liquid cooling plate 105 through the communicated liquid cooling through holes to complete heat exchange.

The second liquid cooling plate 106 may be further disposed below the lower cover plate 103 of the plurality of batteries 100, that is, the first liquid cooling plate 105 in each battery 100 penetrates through the lower cover plate 103 and contacts with the second liquid cooling plate 106, that is, the plurality of batteries 100 may share one second liquid cooling plate 106. Referring to fig. 1C, a third schematic structure of a battery according to an embodiment of the present utility model is shown, and with the above structure, each first liquid cooling plate 105 can make the first heat exchange medium and the second heat exchange medium complete heat exchange after contacting with the second liquid cooling plate 106.

By adopting the battery structure provided by the embodiment, the whole battery 100 can be thick, the battery core 104 with the internal design can be divided into multiple layers, so that the density of the battery 100 is increased, the problem of low heat dissipation capacity due to the existence of the first liquid cooling plates can be avoided, the first liquid cooling plates 105 are arranged between the battery cores 104, the heat exchange efficiency of the battery core 104 can be improved, and the battery 100 can maintain a proper working temperature due to the contact between the bottom second liquid cooling plates 106 and the plurality of first liquid cooling plates 105, so that the service life of the battery 100 is prolonged.

In the embodiment of the present utility model, the first heat exchange medium in the first liquid cooling plate 105 and the second heat exchange medium in the second liquid cooling plate 106 may be any one of purified water, mineral oil or special cooling liquid, and the present utility model is not limited to the heat exchange medium specifically.

In order to further enhance the heat dissipation capacity, referring to fig. 3, a schematic diagram of a three-dimensional structure of a battery is shown, wherein one side of each first liquid cooling plate 105, which is close to the second liquid cooling plate 106, is provided with at least one liquid cooling through hole 301, each first liquid cooling plate 105 is communicated with the second liquid cooling plate 106 through the at least one liquid cooling through hole 301, and the first heat exchange medium and the second heat exchange medium circulate through the at least one liquid cooling through hole 301.

The first liquid cooling plate 105 may include a plurality of capillary tubes, where the plurality of capillary tubes are connected to the second liquid cooling plate 106 through the liquid cooling through holes 301, and the second heat exchange medium in the second liquid cooling plate 106 is sucked into the first liquid cooling plate 105 by the liquid cooling through holes 301 through capillary phenomena of the capillary tubes, so as to realize a cooling cycle of the heat exchange medium in the first liquid cooling plate 105. As the battery 100 operates, a large amount of waste heat is generated by the internal electric core 104, and the heat generated by the electric core 104 is absorbed by the first heat exchange medium in the first liquid cooling plate 105, and the heat of the first heat exchange medium is taken away by the second heat exchange medium sucked. Through the arrangement of the capillary ducts in the first liquid cooling plate 105, the second heat exchange medium can be automatically sucked into a plurality of capillary ducts in the first liquid cooling plate 105 through capillary phenomenon, and the circulation of the heat exchange medium can be realized only by a water pump with smaller power outside, so that the space is saved, and the whole battery 100 is more compact in structure.

As a possible implementation manner, a first liquid cooling channel is arranged inside each first liquid cooling plate 105, at least one first liquid cooling through hole communicated with the first liquid cooling channel is formed in one side, close to the second liquid cooling plate 106, of each first liquid cooling plate 106, a second liquid cooling channel is arranged inside each second liquid cooling plate 106, and at least one second liquid cooling through hole communicated with the second liquid cooling channel is formed in one side, close to the first liquid cooling plate 105, of each second liquid cooling plate 106; the first heat exchange medium and the second heat exchange medium circulate through the first liquid cooling passage, the at least one first liquid cooling through hole, the at least one second liquid cooling through hole and the second liquid cooling passage.

Referring to fig. 4, which is a schematic cross-sectional view of the first liquid cooling plates, each of the first liquid cooling plates 105 may be provided with two first liquid cooling through holes (401, 402) near the second liquid cooling plate 106. When the first liquid cooling through hole 401 is a liquid inlet hole, then the first liquid cooling through hole 402 may be a liquid outlet hole, and when the first liquid cooling through hole 402 is a liquid inlet hole, then the first liquid cooling through hole 401 may be a liquid outlet hole. The first liquid cooling plate 105 is formed by connecting a plurality of parallel U-shaped liquid cooling passages 403 in series, and the plurality of parallel U-shaped liquid cooling passages 403 are symmetrically arranged along the central line of the first liquid cooling plate 105. After the heat exchange medium entering the inside through the liquid inlet hole enters the U-shaped liquid cooling passage 403 to flow and exchange heat with the battery cell 104, the heat exchange medium enters the second liquid cooling plate 106 through the liquid outlet hole respectively, and the flow resistance can be effectively reduced by adopting the form of the U-shaped liquid cooling passage, so that the flow uniformity is ensured, and the cooling and heat dissipation efficiency is effectively improved.

As a possible implementation manner, the second liquid cooling passage in the second liquid cooling plate 106 is further connected to an external cold source, and the external cold source is used for circularly supplying the cooled second heat exchange medium to the second liquid cooling passage, wherein the external cold source comprises a radiator and a cooling fan; the cooling fan is used for cooling the second heat exchange medium flowing through the radiator by using inhaled air.

For example, the radiator may be a finned tube radiator, the fins may be aluminum wave fins, and the cooling fan draws ambient air into the finned tube radiator to reduce the temperature of the second heat exchange medium. In addition, the external heat sink may adjust the rotation speed of the cooling fan according to the temperature of the battery 100, and the higher the temperature of the battery 100, the faster the rotation speed of the cooling fan.

In addition, the battery 100 further includes a compression refrigeration module including: a heat exchanger, a compressor, a condenser, and a circulation pump; the circulating pump is used for driving the second heat exchange medium to circularly flow in the second liquid cooling plate 106; the compressor is used for compressing the second heat exchange medium into a high-pressure gaseous state; the condenser is used for gasifying the second heat exchange medium by absorbing heat in the air or condensing and cooling the compressed second heat exchange medium.

When the battery core 104 in the battery 100 needs to be cooled, the compressor in the embodiment of the utility model is used for cooling the flowing second heat exchange medium through compression, flowing into the condenser, further cooling through the condenser, enabling the refrigerant cooled by the compressor and the condenser to enter the second liquid cooling plate 106, and performing heat exchange by contacting the second liquid cooling plate 106 with the first liquid cooling plate 105, so as to realize the cooling of the battery core 104.

In order to prevent the heat exchange medium from flowing out, as a possible embodiment, a sealing material may be further disposed at a contact portion between each of the first liquid cooling plates 105 and the second liquid cooling plate 106. That is, the contact part between the first liquid cooling plate 105 and the second liquid cooling plate 106 can be sealed in a glue filling manner to avoid gaps, so that the airtight sealing between the first liquid cooling plate 105 and the second liquid cooling plate 106 is ensured, and meanwhile, the stability of the first liquid cooling plate 105 and the second liquid cooling plate 106 is further enhanced.

The surface of the first liquid cooling plate 105 near one side of the second liquid cooling plate 106 may be arranged with heat conducting glue or heat conducting silicone grease, and the first liquid cooling plate 105 compresses the heat conducting glue or heat conducting silicone grease by the fixing force between the first liquid cooling plate 105 and the second liquid cooling plate 106 to reduce heat conducting resistance.

It should be noted that, the contact portion between the first liquid cooling plate 105 and the second liquid cooling plate 106 may further include a heat insulation structure, the heat insulation structure may be heat insulation cotton, and the heat insulation cotton may be, but is not limited to, a heat insulation material such as silica aerogel. The heat insulation structure can play a role in isolating external air flow, and improves heat exchange efficiency.

In order to avoid internal ignition of the battery 100, referring to fig. 5, fig. 5 is a schematic three-dimensional structure of a battery, as a possible implementation manner, a plurality of high-temperature cracking holes 501 may be further provided on an outer wall of each first liquid cooling plate 105, and when the surface temperature of the first liquid cooling plate 105 exceeds a set temperature threshold, at least one high-temperature cracking hole 501 may encounter high temperature and automatically crack to spray the first heat exchange medium into the accommodating space. In this way, when the thermal runaway occurs in the battery core 104, and the surface temperature of the first liquid cooling plate 105 exceeds the set temperature threshold value, the high-temperature cracking hole 501 automatically cracks, so that the first heat exchange medium is sprayed into the accommodating space from the high-temperature cracking hole 501, the battery 100 can be cooled timely, the thermal runaway process in the battery 100 is restrained, and even if the battery 100 fires, a certain restraining effect on flame can be achieved.

As a possible implementation manner, the first heat exchange medium may be perfluoro-hexanone, where the perfluoro-hexanone is quickly vaporized to take away heat after encountering heat, so that the overall temperature of the battery 100 is reduced, fire is naturally extinguished, and the perfluoro-hexanone forms an isolation layer inside the accommodating space when being sprayed, and the isolation layer isolates the electric core from oxygen, so that the fire can be extinguished quickly.

Based on the battery 100 described above, an embodiment of the present utility model provides a battery pack including a battery management system and the battery 100 described in the above embodiment, where the battery management system is electrically connected to the battery 100, and is configured to obtain parameter information of the battery 100, and to send control information to the battery 100. Since the above-mentioned battery 100 has corresponding technical effects, the battery pack provided herein also has corresponding technical effects, and the description thereof will be omitted.

The embodiment of the utility model also provides an energy storage system which comprises the energy storage converter and the battery pack of the embodiment, wherein the energy storage converter is electrically connected with a battery management system of the battery pack and is used for processing the current input into the battery pack and inputting the current into the battery pack. Since the above-mentioned battery 100 has corresponding technical effects, the energy storage system provided herein also has corresponding technical effects, and the discussion will not be repeated.

The embodiment of the utility model also provides an electric vehicle, referring to fig. 6, fig. 6 is a schematic structural diagram of an electric vehicle, and the electric vehicle includes a vehicle body 600 and a battery 601 provided in the above embodiment. The vehicle body 600 is further provided with a power module 602, and the power module 602 is a power system of an electric vehicle. The battery 601 is used for supplying power to the power module 602, and the power module 602 can convert electric energy into mechanical energy so as to drive the electric automobile. Since the above-mentioned battery 100 has corresponding technical effects, the electric vehicle provided herein also has corresponding technical effects, and the discussion will not be repeated.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (11)

1. A battery, comprising: the battery comprises a battery shell, an upper cover plate, a lower cover plate, a plurality of battery cells, a plurality of first liquid cooling plates and a plurality of second liquid cooling plates; a first heat exchange medium is arranged in each first liquid cooling plate, and a second heat exchange medium is arranged in each second liquid cooling plate;

the battery shell, the upper cover plate and the lower cover plate form an accommodating space, and the plurality of battery cells are arranged in the accommodating space;

the battery cells are connected in parallel along the radial direction of the battery shell, and one first liquid cooling plate is arranged between two adjacent battery cells;

the upper cover plate is provided with a pole, the pole is connected with each electric core in the plurality of electric cores, the second liquid cooling plate is arranged outside the accommodating space and below the lower cover plate, and each first liquid cooling plate penetrates through the lower cover plate to be in contact with the second liquid cooling plate; after each first liquid cooling plate is contacted with the second liquid cooling plate, the first heat exchange medium and the second heat exchange medium are subjected to heat exchange.

2. The battery according to claim 1, wherein at least one liquid cooling through hole is formed in a side, close to the second liquid cooling plate, of each first liquid cooling plate, the first liquid cooling plate is communicated with the second liquid cooling plate through the at least one liquid cooling through hole, and the first heat exchange medium and the second heat exchange medium are circulated through the at least one liquid cooling through hole.

3. The battery according to claim 1, wherein a first liquid cooling channel is arranged in each first liquid cooling plate, and at least one first liquid cooling through hole communicated with the first liquid cooling channel is formed in one side of each first liquid cooling plate, which is close to the second liquid cooling plate; a second liquid cooling channel is arranged in the second liquid cooling plates, and one side, close to the first liquid cooling plate, of each second liquid cooling plate is provided with at least one second liquid cooling through hole communicated with the second liquid cooling channel;

the first heat exchange medium and the second heat exchange medium circulate through the first liquid cooling passage, the at least one first liquid cooling through hole, the at least one second liquid cooling through hole and the second liquid cooling passage.

4. The battery according to claim 3, wherein the second liquid cooling passage in the second liquid cooling plate is further connected to an external heat sink for circulating the cooled second heat exchange medium to the second liquid cooling passage.

5. The battery according to claim 4, wherein the external heat sink includes a radiator in communication with the second liquid cooling passage, and a cooling fan for cooling the second heat exchange medium flowing through the radiator with inhaled air.

6. The battery of any one of claims 1-5, wherein a sealing material is disposed at a contact of each of the first and second liquid cooling plates.

7. The battery according to any one of claims 1 to 6, wherein a plurality of high-temperature rupture holes are provided in an outer wall of each of the first liquid cooling plates, and when a surface temperature of the first liquid cooling plate exceeds a set temperature threshold value, at least one of the high-temperature rupture holes is ruptured to spray the first heat exchange medium into the accommodating space.

8. The battery of claim 7, wherein the first heat exchange medium is perfluorinated hexanone.

9. A battery pack comprising a battery management unit and the battery according to any one of claims 1 to 8; the battery management unit is electrically connected with the battery and is used for acquiring parameter information of the battery and sending control information to the battery.

10. An energy storage system comprising an energy storage converter and the battery pack of claim 9, the energy storage converter in signal communication with the battery management unit for processing current input to the battery.

11. An electric vehicle comprising a vehicle body having a power module and the energy storage system of claim 10 for powering the power module.