CN117374465A - Semi-submerged battery pack, system and method of manufacture - Google Patents

Semi-submerged battery pack, system and method of manufacture Download PDF

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Publication number
CN117374465A
CN117374465A CN202311589723.5A CN202311589723A CN117374465A CN 117374465 A CN117374465 A CN 117374465A CN 202311589723 A CN202311589723 A CN 202311589723A CN 117374465 A CN117374465 A CN 117374465A
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CN
China
Prior art keywords
liquid
battery
coolant
battery pack
pipeline
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Pending
Application number
CN202311589723.5A
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Chinese (zh)
Inventor
许祎凡
黄伟东
魏辉
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Suzhou Binai New Energy Technology Co ltd
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Suzhou Binai New Energy Technology Co ltd
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Priority to CN202311589723.5A priority Critical patent/CN117374465A/en
Publication of CN117374465A publication Critical patent/CN117374465A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/28—Accessories for delivery devices, e.g. supports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a semi-submerged battery pack, a system and a manufacturing method. The semi-submerged battery pack of the present invention includes: the top of the battery box body is provided with an explosion-proof valve; the battery module is accommodated in the battery box body and comprises a plurality of battery modules which are arranged at intervals and a plurality of connecting sheets which are used for connecting adjacent single batteries in the battery modules in series and parallel; and the spray pipe is arranged above the battery module, wherein a flow channel for the fire-fighting coolant to flow is formed in the inner bottom of the battery box body, a battery pack liquid inlet communicated with the spray pipe is formed in the upper end part of the side wall of the battery box body, a battery pack liquid outlet communicated with the flow channel is formed in the lower end part of the side wall of the battery box body, and the liquid level of the fire-fighting coolant contained in the battery box body is lower than the height of a safety valve on the single battery and an explosion-proof valve on the battery box body.

Description

Semi-submerged battery pack, system and method of manufacture
Technical Field
The invention belongs to the technical field of battery application, and particularly relates to a semi-submerged battery pack, a semi-submerged battery system and a manufacturing method.
Background
The battery can generate a large amount of heat in the rapid charge and discharge process, if the heat cannot be timely emitted, the service life of the battery is shortened if the heat is light, and the thermal runaway and thermal expansion of the battery are caused if the heat is heavy. Therefore, thermal management of the battery is a problem that must first be considered during the design and use of the battery pack.
In the prior art, battery thermal management techniques are mainly air-cooled and liquid-cooled. The air-cooled heat management has insufficient heat dissipation capacity in the period, so that the application of the air-cooled heat management to new energy automobiles needing rapid charge and discharge is limited. The liquid cooling battery thermal management technology mainly comprises indirect liquid cooling and immersed liquid cooling. The indirect liquid cooling is to introduce cooling liquid into the liquid cooling plate and then indirectly cool the battery by the liquid cooling plate, and has the defects of slow cooling, complex structure and the like.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a semi-submerged battery pack, a system and a manufacturing method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
< protocol one >
The present invention provides a semi-submerged battery pack having the features of: the top of the battery box body is provided with an explosion-proof valve; the battery module is accommodated in the battery box body and comprises a plurality of battery modules which are arranged at intervals and a plurality of connecting sheets which are used for connecting adjacent single batteries in the battery modules in series and parallel; and the spray pipe is arranged above the battery module, wherein a flow channel for the fire-fighting coolant to flow is formed in the inner bottom of the battery box body, a battery pack liquid inlet communicated with the spray pipe is formed in the upper end part of the side wall of the battery box body, a battery pack liquid outlet communicated with the flow channel is formed in the lower end part of the side wall of the battery box body, and the liquid level of the fire-fighting coolant contained in the battery box body is lower than the height of a safety valve on the single battery and an explosion-proof valve on the battery box body.
In the semi-submerged battery pack provided by the invention, the semi-submerged battery pack can also have the following characteristics: the fire-fighting coolant is an insulating, flame-retardant, high-specific heat capacity, wide-temperature-range, electrochemically stable and low-viscosity liquid.
In the semi-submerged battery pack provided by the invention, the semi-submerged battery pack can also have the following characteristics: wherein, the dielectric constant of the fire-fighting coolant is 0.1-50 kV/mm, the specific heat capacity is 200-3000J/(kg. ℃), the use temperature is-40-150 ℃, and the viscosity is 0.001-10000 Pa.s.
< protocol two >
The present invention also provides a semi-submerged battery system having the features that it includes: a semi-submerged battery pack of the first aspect; and the heat exchange part comprises a heat exchanger, a liquid inlet pipeline, a liquid return pipeline and a liquid pump, wherein the heat exchanger is provided with a coolant outlet and a coolant inlet, two ends of the liquid inlet pipeline are respectively communicated with the liquid inlet of the battery pack and the coolant outlet, two ends of the liquid return pipeline are respectively communicated with the liquid outlet of the battery pack and the coolant inlet, and the liquid pump is arranged on the liquid inlet pipeline and is used for enabling the fire-fighting coolant to circularly flow.
< protocol three >
The present invention also provides a semi-submerged battery system having the features that it includes: m layer N column < scheme one > semi-submerged battery packs; and a heat exchange part including a heat exchanger, m×n liquid inlet pipes, m×n liquid return pipes, m×n liquid pumps, and m×n check valves, wherein the heat exchanger has m×n heat exchange units, each heat exchange unit has a coolant outlet and a coolant inlet, both ends of each liquid inlet pipe are respectively communicated with the corresponding battery pack liquid inlet and coolant outlet, both ends of each liquid return pipe are respectively communicated with the corresponding battery pack liquid return inlet and coolant inlet, each liquid pump is mounted on the corresponding liquid inlet pipe for circulating the fire-fighting coolant, each check valve is mounted on the corresponding liquid return pipe, and M, N is a positive integer greater than or equal to 1.
< scheme IV >
The present invention also provides a semi-submerged battery system having the features that it includes: m layer N column < scheme one > semi-submerged battery packs; and a heat exchange part including a heat exchanger, a liquid storage tank, a liquid inlet main pipe, M liquid inlet branch pipes, a liquid return main pipe, M liquid return branch pipes, M liquid pumps and M one-way valves, wherein the heat exchanger is provided with a coolant outlet and a coolant inlet, the liquid storage tank is provided with a liquid storage tank liquid inlet and M liquid storage tank liquid outlets, two ends of the liquid inlet main pipe are respectively communicated with the liquid storage tank liquid inlet and the coolant outlet, one end of each liquid inlet branch pipe is respectively communicated with the liquid storage tank liquid outlet corresponding to the liquid inlet, the other end of each liquid inlet main pipe is respectively communicated with the battery pack liquid inlets of N semi-immersed battery packs in a layer corresponding to the liquid inlet main pipe, one end of each liquid return main pipe is respectively communicated with the coolant inlet, the other end of each liquid return branch pipe is respectively communicated with the battery pack liquid outlets of N semi-immersed battery packs in a layer corresponding to the liquid pump, each liquid pump is arranged on a part of the liquid storage tank and the semi-immersed battery packs corresponding to the liquid pump, and the liquid pump is used for enabling the cooling liquid to flow between the corresponding liquid return main pipe and the whole fire protection part and the fire protection part corresponding to be equal to the whole number of the whole fire protection part and the whole fire protection part of the fire protection part and the whole fire protection part is equal to the whole number between the two heat pump.
< protocol five >
The invention also provides a manufacturing method of the semi-immersed battery system, which has the characteristics that the manufacturing method comprises the following steps:
the positive and negative poles of a plurality of single batteries are staggered;
connecting the positive and negative poles of the plurality of single batteries in series and parallel by using a connecting sheet to form a battery module;
a spray pipe is arranged at the top of the connecting sheet to form a battery module;
one or more battery modules are hermetically arranged in a battery box body to form a battery pack;
a liquid inlet of the battery pack is connected with a coolant outlet of the heat exchanger in series by a liquid inlet pipeline, and a liquid pump is arranged on the liquid inlet pipeline; the liquid return port of the battery pack is connected with the coolant inlet of the heat exchanger in series by a liquid return pipeline;
and pumping fire-fighting coolant into the battery pack through the liquid pump, so as to finish the manufacture of the semi-submerged battery system.
< protocol six >
The invention also provides a manufacturing method of the semi-immersed battery system, which has the characteristics that the manufacturing method comprises the following steps:
the positive and negative poles of a plurality of single batteries are staggered;
connecting the positive and negative poles of the plurality of single batteries in series and parallel by using a connecting sheet to form a battery module;
a spray pipe is arranged at the top of the connecting sheet to form a battery module;
one or more battery modules are hermetically arranged in a battery box body to form a battery pack;
all battery pack liquid inlets in one layer are connected in parallel by a liquid inlet branch pipeline, and a liquid pump is arranged on the liquid inlet branch pipeline; all battery pack liquid return ports in one layer are connected in parallel by a liquid return branch pipeline, and a one-way valve is arranged on the liquid return branch pipeline;
each liquid inlet branch pipeline is communicated with a liquid outlet of a corresponding liquid storage tank, and a liquid inlet of the liquid storage tank is connected in series with a coolant outlet of the heat exchanger through a liquid inlet main pipeline; all liquid return branch pipelines are connected in series with a coolant inlet of the heat exchanger by a liquid return main pipeline;
and pumping fire-fighting coolant into the battery pack through the liquid pump, so as to finish the manufacture of the semi-submerged battery system.
Effects and effects of the invention
According to the semi-submerged battery system, as the spray pipe is arranged above the battery module, the flow channel for the fire-fighting coolant to flow is formed in the inner bottom of the battery box, the upper end part of the side wall of the battery box is provided with the battery pack liquid inlet communicated with the spray pipe, the lower end part of the side wall of the battery box is provided with the battery pack liquid outlet communicated with the flow channel, the liquid level of the fire-fighting coolant contained in the battery box is lower than the height of the safety valve and the explosion-proof valve, the fire-fighting coolant is sprayed on the top of the battery and directly contacts with the battery, the heat transfer efficiency is high, and the temperature in the battery pack is more uniform; moreover, the fire-fighting coolant can be recycled in the battery pack, so that the consumption is low and the cost is low.
Drawings
FIG. 1 is a schematic diagram of a semi-submerged battery system in an embodiment of the invention;
fig. 2 is a schematic structural view of a semi-submerged battery pack in an embodiment of the present invention;
fig. 3 is a schematic diagram of a semi-submerged battery system according to a modification of the present invention; and
fig. 4 is a schematic diagram of a semi-submerged battery system according to a second modification of the present invention.
Detailed Description
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
< example >
Fig. 1 is a schematic diagram of a semi-submerged battery system in an embodiment of the invention.
As shown in fig. 1, in the present embodiment, a semi-submerged battery system 100 includes a semi-submerged battery pack 10 and a heat exchanging part 20.
Fig. 2 is a schematic structural view of a semi-submerged battery pack in an embodiment of the present invention.
As shown in fig. 1 and 2, the semi-submerged battery pack 10 includes a battery case 11, a battery module 12, and a shower pipe 13.
The battery box 11 is a rectangular box, the upper end of one end side wall of which is provided with a battery pack liquid inlet 111, and the lower end of which is provided with a battery pack liquid outlet 112. A flow passage 113 through which the fire-fighting coolant 14 flows is formed in the inner bottom of the battery case 11, and the flow passage 113 communicates with the battery pack liquid outlet 112. In the present embodiment, the top of the battery case 11 is provided with an explosion-proof valve 114.
The battery module 12 is accommodated in the battery case 11, and includes a plurality of battery modules 121 arranged at intervals. Each of the battery modules 121 includes a plurality of unit cells 121a arranged alternately in positive and negative poles, and a plurality of connection pieces 121b for connecting adjacent unit cells 121a in series and parallel. In the present embodiment, the top of each unit cell 121a is provided with a safety valve (not shown in the drawings).
The shower pipe 13 is installed above the battery module 12 and communicates with the battery pack liquid inlet 111.
As shown in fig. 1, the heat exchange portion 20 includes a heat exchanger 21, a liquid inlet pipe 22, a liquid return pipe 23, and a liquid pump 24.
The heat exchanger 21 has a coolant outlet 21a and a coolant inlet 21b.
Both ends of the liquid inlet pipe 22 are respectively communicated with the battery pack liquid inlet 111 and the coolant outlet 21 a.
Both ends of the liquid return pipe 23 are respectively communicated with the battery pack liquid outlet 112 and the coolant inlet 21b.
A liquid pump 24 is installed on the liquid inlet pipe 22, and is used for pumping the fire-fighting coolant 14 into the battery pack 10 and circulating the fire-fighting coolant 14, wherein the circulating process of the fire-fighting coolant 14 is specifically as follows: the fire-fighting coolant 14 is sprayed to the connecting sheet 121b at the upper end of the battery module 12 from the spraying pipe 13, and after the fire-fighting coolant 14 absorbs heat of the connecting sheet 121b, the fire-fighting coolant drops to the bottom of the single battery 121a along the edge of the single battery 121a, passes through the flow channel 113 at the bottom of the battery module 12, and is collected to the battery pack liquid outlet 112 to flow out, so that heat in the battery pack 10 is transferred to the heat exchanger 21.
In the present embodiment, the liquid level of the fire-fighting coolant 14 contained in the battery case 11 is lower than the height of the safety valve and the explosion-proof valve 114 of the unit battery 121 a; the fire-fighting coolant 14 is an insulating, flame-retardant, high specific heat capacity, wide temperature range, electrochemically stable, low viscosity liquid with specific parameters: the dielectric constant is 0.1-50 kV/mm, the specific heat capacity is 200-3000J/(kg. ℃), the use temperature is-40-150 ℃, and the viscosity is 0.001-10000 Pa.s.
In this embodiment, the present invention also provides a manufacturing method for manufacturing the above-described half-immersion battery system 100, the manufacturing method including the steps of:
in step S1-1, the positive and negative electrodes of the plurality of unit cells 121a are alternately arranged.
In step S1-2, the positive and negative electrodes of the plurality of unit cells 121a are connected in series and parallel by the connecting sheet 121b to form the battery module 121.
In step S1-3, the shower pipe 13 is installed on the top of the connecting piece 121b to form the battery module 12.
In step S1-4, one or more battery modules 12 are sealed and mounted in a battery case 11 to form a battery pack 10.
Step S1-5, connecting the battery pack liquid inlet 111 with the coolant outlet 21a of the heat exchanger 21 by using a liquid inlet pipeline 22, and installing a liquid pump 24 on the liquid inlet pipeline 22; the battery pack return port 112 is connected to the coolant inlet 21b of the heat exchanger 21 by a return pipe 23.
In steps S1-6, the fire-fighting coolant 14 is pumped into the battery pack 10 by the liquid pump 24, thus completing the manufacture of the semi-submerged battery system 100.
Effects and effects of the examples
According to the semi-submerged battery system, as the spray pipe is arranged above the battery module, a flow channel for the fire-fighting coolant to flow is formed in the inner bottom of the battery box, the upper end part of the side wall of the battery box is provided with a battery pack liquid inlet communicated with the spray pipe, the lower end part of the side wall of the battery box is provided with a battery pack liquid outlet communicated with the flow channel, the liquid level of the fire-fighting coolant contained in the battery box is lower than the height of the safety valve and the explosion-proof valve, the fire-fighting coolant is sprayed on the top of the battery and directly contacts with the battery, the heat transfer efficiency is high, and the temperature in the battery pack is more uniform; moreover, the fire-fighting coolant can be recycled in the battery pack, so that the consumption is low and the cost is low.
< modification example one >
In the first modification, the same components as those in the embodiment are denoted by the same reference numerals, and the same description is omitted.
Fig. 3 is a schematic diagram of a semi-submerged battery system according to a modification of the present invention.
As shown in fig. 3, in the first modification, the half-submerged battery system 200 includes M layers of N rows of half-submerged battery packs 10 and heat exchanging portions 220, where M and N are positive integers equal to or greater than 1.
The heat exchange unit 220 includes a heat exchanger 21, m×n liquid feed pipes 22, m×n liquid return pipes 23, and m×n liquid pumps 24.
The heat exchanger 21 has m×n heat exchange units 211 in one-to-one correspondence with the M-layer N-column half-submerged battery packs 10, and each heat exchange unit 211 has a coolant outlet 211a and a coolant inlet 211b.
The m×n liquid inlet pipes 22, the m×n liquid return pipes 23, and the m×n liquid pumps 24 are in one-to-one correspondence with the M-layer N-column half-submerged battery packs 10.
Both ends of each of the liquid inlet pipes 22 are respectively communicated with the corresponding battery pack liquid inlet 111 and the coolant outlet 211 a.
Both ends of each liquid return pipe 23 are respectively communicated with the corresponding battery pack liquid return port 112 and the coolant inlet port 211b.
Each liquid pump 24 is mounted on a corresponding liquid inlet conduit 22.
In a first modification, the present invention also provides a manufacturing method for manufacturing the above-mentioned half-submerged battery system 200. The manufacturing method comprises the following steps:
in step S2-1, the positive and negative electrodes of the plurality of unit cells 121a are alternately arranged.
In step S2-2, the positive and negative electrodes of the plurality of unit cells 121a are connected in series and parallel by the connecting sheet 121b to form the battery module 121.
In step S2-3, the shower pipe 13 is installed on the top of the connection piece 121b to form the battery module 12.
And S2-4, sealing and installing one or more battery modules 12 in the battery box 11 to form the battery pack 10.
Step S2-5, connecting a battery pack liquid inlet 111 of the battery pack 10 and a coolant outlet 211a of a corresponding heat exchange unit 211 in series by using a liquid inlet pipeline 22, and installing a liquid pump 24 on the liquid inlet pipeline 22; the battery pack liquid return port 112 of the battery pack 10 is connected in series with the coolant inlet 211b of the corresponding heat exchange unit 211 by the liquid return pipe 23.
In step S2-6, the fire-fighting coolant 14 is pumped into the battery pack 10 by the liquid pump 24, thus completing the manufacture of the semi-submerged battery system 200.
In the first modification, in addition to the functions and effects of the embodiment, since each battery pack is provided with one heat exchange unit and one liquid pump, the fire-fighting coolant is divided into m×n flow paths, and the fire-fighting coolant passes through the m×n heat exchange units, so that heat generated by the operation of the corresponding battery pack can be taken away, and accurate control of the heat of each battery pack can be realized.
< modification II >
The second modification is a further modification of the embodiment, and the same constituent elements as those in the embodiment are given the same reference numerals, and the same description is omitted.
Fig. 4 is a schematic diagram of a semi-submerged battery system according to a second modification of the present invention.
As shown in fig. 4, in the second modification, the half-submerged battery system 300 includes M layers of N rows of half-submerged battery packs 10 and heat exchanging portions 320, and M and N are positive integers equal to or greater than 1.
The heat exchange unit 320 includes the heat exchanger 21, a liquid storage tank 322, a liquid inlet main pipe 323, M liquid inlet branch pipes 324, a liquid return main pipe 325, M liquid return branch pipes 326, M liquid pumps 327, and M check valves 328.
The reservoir 322 has a reservoir inlet 322a and M reservoir outlets 322b.
Both ends of the liquid inlet main pipe 323 are respectively communicated with a liquid inlet 322a of the liquid storage tank and a coolant outlet 21a of the heat exchanger 21.
Each of the liquid inlet branch pipes 324 has one end connected to the liquid outlet 322b of the corresponding liquid storage tank and the other end connected to the battery pack liquid inlets 111 of the corresponding N semi-submerged battery packs 10 in one layer.
The return header 325 has one end connected to the coolant inlet 21b of the heat exchanger 21 and the other end connected to one end of the M return branch 326.
One end of each return branch conduit 326 communicates with the pack outlets 112 of the N semi-submerged battery packs 10 in a corresponding layer.
Each liquid pump 327 is mounted on the portion of the corresponding inlet leg 324 between the liquid storage tank 322 and the semi-submerged battery pack 10.
Each one-way valve 328 is mounted on a conduit of the corresponding return branch conduit 326 between the semi-submerged battery pack 10 and the return main conduit 325.
For each layer of N semi-submerged battery packs 10, the level of fire-fighting coolant 14 in all of the semi-submerged battery packs 10 in that layer is controlled by a liquid pump 327 and a one-way valve 328. The fire-fighting coolant 14 enters the liquid storage tank 322 through the fire-fighting coolant outlet 21a of the heat exchanger 21, then is pressurized by the liquid pump 327 and then enters the liquid inlets 111 of the battery packs respectively through the liquid inlet branch pipelines 324, and is cooled by the battery modules 12 through the spray pipes 13; the fire-fighting coolant 14 is collected at the bottom of the battery pack 10, flows out through the battery pack liquid outlet 112, is connected in parallel through the liquid return branch pipeline 326, and flows back to the fire-fighting coolant inlet 21b of the heat exchanger 21 through the one-way valve 328.
In a second modification, the present invention also provides a manufacturing method for manufacturing the above-described half-submerged battery system 300. The manufacturing method comprises the following steps:
in step S3-1, the positive and negative electrodes of the plurality of unit cells 121a are alternately arranged.
In step S3-2, the positive and negative electrodes of the plurality of unit cells 121a are connected in series and parallel by the connecting sheet 121b to form the battery module 121.
In step S3-3, the shower pipe 13 is installed on the top of the connection piece 121b to form the battery module 12.
And S3-4, sealing and installing one or more battery modules 12 in the battery box 11 to form the battery pack 10.
Step S3-5, connecting the battery pack liquid inlets 111 of all battery packs 10 in one layer in parallel by using a liquid inlet branch pipeline 324, and installing a liquid pump 327 on the liquid inlet branch pipeline 324; the battery pack liquid return ports 112 of all battery packs 10 in one layer are connected in parallel by a liquid return branch pipe 326, and a check valve 328 is arranged on the liquid return branch pipe 326.
Step S3-6, each liquid inlet branch pipeline 324 is communicated with a liquid storage tank liquid outlet 322b of a corresponding liquid storage tank 322, and a liquid storage tank liquid inlet 322a of the liquid storage tank 322 is communicated with a coolant outlet 21a of the heat exchanger 21 by using a liquid inlet main pipeline 323; all return branch lines 326 are connected to the coolant inlet 21b of the heat exchanger 21 by a return main line 325.
In step S3-7, the fire-fighting coolant 14 is pumped into the battery pack 10 by the liquid pump 327, thus completing the manufacture of the semi-submerged battery system 300.
In the second modification, in addition to the functions and effects of the embodiments, for each layer of N semi-submerged battery packs, the battery pack liquid inlet and the battery pack liquid outlet of all the semi-submerged battery packs of the layer are connected in parallel through the liquid inlet branch pipe and the liquid return branch pipe, so that the multi-layer battery pack can share one liquid storage tank and one heat exchanger; the fire-fighting coolant immersed height in all battery packs in the corresponding layer is controlled by adjusting the opening and closing of the liquid pump and the one-way valve, so that the battery in thermal runaway or on fire is accurately cooled and extinguished, and the fire-extinguishing effect is good.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.

Claims (8)

1. A semi-submerged battery pack, characterized by comprising:
the top of the battery box body is provided with an explosion-proof valve;
the battery module is accommodated in the battery box and comprises a plurality of battery modules which are arranged at intervals, and a plurality of connecting sheets which are used for connecting adjacent single batteries in the battery modules in series and parallel, and each single battery is provided with a safety valve; and
a spray pipe which is arranged above the battery module,
wherein, a flow passage for the fire-fighting coolant to flow is arranged at the inner bottom of the battery box body,
the upper end part of the side wall of the battery box body is provided with a battery pack liquid inlet which is connected and communicated with the spray pipe, the lower end part of the side wall of the battery box body is provided with a battery pack liquid outlet which is communicated with the flow passage,
the fire-fighting coolant contained in the battery case has a liquid level lower than the heights of the safety valve and the explosion-proof valve.
2. A semi-submerged battery pack according to claim 1, wherein:
the fire-fighting coolant is an insulating, flame-retardant, high-specific heat capacity, wide-temperature-range, electrochemically stable and low-viscosity liquid.
3. A semi-submerged battery pack according to claim 2, wherein:
wherein, the dielectric constant of the fire-fighting coolant is 0.1-50 kV/mm, the specific heat capacity is 200-3000J/(kg. ℃), the use temperature is-40-150 ℃, and the viscosity is 0.001-10000 Pa.s.
4. A semi-submerged battery system, characterized by comprising:
a semi-submerged battery pack according to any one of claims 1 to 3; and
the heat exchange part comprises a heat exchanger, a liquid inlet pipeline, a liquid return pipeline and a liquid pump,
wherein the heat exchanger is provided with a coolant outlet and a coolant inlet,
two ends of the liquid inlet pipeline are respectively connected with the liquid inlet of the battery pack and the coolant outlet,
two ends of the liquid return pipeline are respectively connected with the liquid outlet of the battery pack and the coolant inlet,
the liquid pump is arranged on the liquid inlet pipeline and is used for enabling the fire-fighting coolant to circulate.
5. A semi-submerged battery system, characterized by comprising:
a half-submerged battery pack according to any one of claims 1 to 3 in M-layer N columns; and
the heat exchange part comprises a heat exchanger, M multiplied by N liquid inlet pipelines, M multiplied by N liquid return pipelines, M multiplied by N liquid pumps and M multiplied by N check valves,
wherein the heat exchanger has M x N heat exchange units, each having a coolant outlet and a coolant inlet,
two ends of each liquid inlet pipeline are respectively connected with the corresponding liquid inlet of the battery pack and the corresponding coolant outlet,
two ends of each liquid return pipeline are respectively connected with the liquid return port of the corresponding battery pack and the coolant inlet,
each liquid pump is arranged on the corresponding liquid inlet pipeline and is used for circulating the fire-fighting coolant,
each one-way valve is arranged on the corresponding liquid return pipeline,
and M and N are positive integers which are more than or equal to 1.
6. A semi-submerged battery system, characterized by comprising:
a half-submerged battery pack according to any one of claims 1 to 3 in M-layer N columns; and
the heat exchange part comprises a heat exchanger, a liquid storage tank, a liquid inlet main pipeline, M liquid inlet branch pipelines, a liquid return main pipeline, M liquid return branch pipelines, M liquid pumps and M one-way valves,
wherein the heat exchanger is provided with a coolant outlet and a coolant inlet,
the liquid storage tank is provided with a liquid storage tank liquid inlet and M liquid storage tank liquid outlets,
two ends of the liquid inlet main pipeline are respectively connected with the liquid inlet of the liquid storage tank and the coolant outlet,
one end of each liquid inlet branch pipeline is respectively connected with the liquid outlet of the corresponding liquid storage tank, the other end of each liquid inlet branch pipeline is respectively connected with the liquid inlets of the battery packs of N semi-immersed battery packs in the corresponding layer,
one end part of the liquid return main pipeline is connected with the coolant inlet, the other end part of the liquid return main pipeline is respectively connected with one end part of the M liquid return branch pipelines,
the other end part of each liquid return branch pipeline is respectively connected with the battery pack liquid outlets of N semi-immersed battery packs in a corresponding layer,
each of the liquid pumps is mounted on a corresponding one of the liquid inlet branch pipes between the liquid storage tank and the semi-submerged battery pack for circulating the fire-fighting coolant,
each one-way valve is arranged on a pipeline between the corresponding semi-immersed battery pack and the liquid return main pipeline of the liquid return branch pipeline,
and M and N are positive integers which are more than or equal to 1.
7. A method of manufacturing a semi-submerged battery system, comprising the steps of:
the positive and negative poles of a plurality of single batteries are staggered;
connecting the positive electrodes and the negative electrodes of the plurality of single batteries in series and parallel by using connecting sheets to form a battery module;
a spray pipe is arranged at the top of the connecting sheet to form a battery module;
one or more battery modules are hermetically arranged in a battery box body to form a battery pack;
a battery pack liquid inlet of the battery pack is connected in series with a coolant outlet of a heat exchanger or a coolant outlet of a corresponding heat exchange unit in the heat exchanger through a liquid inlet pipeline, and a liquid pump is arranged on the liquid inlet pipeline; a battery pack liquid return port of the battery pack is communicated with a coolant inlet of a heat exchanger or a coolant inlet of a heat exchange unit in a corresponding heat exchanger through a liquid return pipeline;
and pumping fire-fighting coolant into the battery pack through the liquid pump, so as to finish the manufacture of the semi-submerged battery system.
8. A method of manufacturing a semi-submerged battery system, comprising the steps of:
the positive and negative poles of a plurality of single batteries are staggered;
connecting the positive electrodes and the negative electrodes of the plurality of single batteries in series and parallel by using connecting sheets to form a battery module;
a spray pipe is arranged at the top of the connecting sheet to form a battery module;
one or more battery modules are hermetically arranged in a battery box body to form a battery pack;
the liquid inlet branch pipelines are used for connecting the liquid inlets of all the battery packs in one layer in parallel, and a liquid pump is arranged on the liquid inlet branch pipelines; the liquid return ports of all the battery packs in one layer are connected in parallel by a liquid return branch pipeline, and a one-way valve is arranged on the liquid return branch pipeline;
connecting each liquid inlet branch pipeline with a liquid outlet of a corresponding liquid storage tank, and connecting a liquid inlet of the liquid storage tank with a coolant outlet of a heat exchanger in series by using a liquid inlet main pipeline; connecting all the liquid return branch pipelines with a coolant inlet of the heat exchanger in series by using a liquid return main pipeline;
and pumping fire-fighting coolant into the battery pack through the liquid pump, so as to finish the manufacture of the semi-submerged battery system.
CN202311589723.5A 2023-11-27 2023-11-27 Semi-submerged battery pack, system and method of manufacture Pending CN117374465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311589723.5A CN117374465A (en) 2023-11-27 2023-11-27 Semi-submerged battery pack, system and method of manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311589723.5A CN117374465A (en) 2023-11-27 2023-11-27 Semi-submerged battery pack, system and method of manufacture

Publications (1)

Publication Number Publication Date
CN117374465A true CN117374465A (en) 2024-01-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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