CN117393899B - Battery pack with self-temperature-equalization heat management device - Google Patents
Battery pack with self-temperature-equalization heat management device Download PDFInfo
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- CN117393899B CN117393899B CN202311457595.9A CN202311457595A CN117393899B CN 117393899 B CN117393899 B CN 117393899B CN 202311457595 A CN202311457595 A CN 202311457595A CN 117393899 B CN117393899 B CN 117393899B
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- collecting box
- heat exchange
- battery
- header
- cooling liquid
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- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000000110 cooling liquid Substances 0.000 claims abstract description 33
- 238000005192 partition Methods 0.000 claims abstract description 29
- 230000005484 gravity Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000007789 sealing Methods 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000008832 photodamage Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
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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
-
- 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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
-
- 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
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery pack with a self-temperature-equalizing heat management device, which comprises a battery box, a first collecting box arranged in the battery box, a plurality of battery cores arranged on the first collecting box in parallel, and a second collecting box arranged at the top of the battery cores, wherein cooling liquid is filled in the first collecting box and the second collecting box, a plurality of heat exchange partition plates are arranged on two sides of each battery core in a fitting manner, and each heat exchange partition plate is communicated with the first collecting box and the second collecting box; the liquid pump is arranged on the return pipe; the cooling liquid in the second collecting box flows into the first collecting box from the first collecting box through each heat exchange baffle under the driving of gravity, the cooling liquid in the first collecting box flows back into the second collecting box through the return pipe under the action of the liquid pump, and a circulation loop is formed between the first collecting box and the second collecting box by the cooling liquid, so that each battery core maintains an isothermal state, and the risk of out-of-control of the battery Bao Re is greatly reduced.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack with a self-temperature-equalization heat management device.
Background
At present, after a plurality of battery cells are stacked, all battery cells are integrated into a whole in a serial or parallel mode among the battery cells to form an energy package. Since the battery generates heat during charge and discharge, the heat may accumulate in the battery pack if not dissipated in time, resulting in thermal runaway, light damage to the life of the battery pack, heavy fire, etc., wherein thermal runaway of the individual battery cells tends to affect the entire battery pack.
Therefore, the research on the heat management of the battery is a continuous problem in industry, such as a heat exchanger assembly of a battery pack disclosed in chinese patent application CN115332685A published 11/2022, which adopts two current collecting panels disposed on the upper and lower sides of the battery, and uses a heat exchanging plate with a sub-flow channel to connect the two current collecting panels, so that the heat exchanging medium can circulate. The prior art adopts a flow equalizing structure to obtain uniform flow distribution, but the manufacturing cost is quite high, and the manufacturing precision and the assembly precision of the flow dividing sheet are difficult to ensure. If the current collecting plate and the heat exchanging plate are welded by adopting a welding technology, the welding positions are too many, and the welding quality of the connecting part positioned inside is difficult to ensure, so that a battery pack self-temperature equalizing device which is safer and more reliable and is easy to implement is needed to be researched.
In view of the above, there is a need for improvements in the art to solve the above-described problems.
Disclosure of Invention
The invention aims to disclose a battery pack with a self-temperature-equalizing temperature management device, which is used for maintaining each battery core in the battery pack in an isothermal state, so that the risk of losing control of a battery Bao Re is reduced.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a battery package with from samming thermal management device, has placed first header including top open-ended battery case, battery incasement, and a plurality of battery core parallel placement is in on the first header to and place the second header at a plurality of battery core tops, first header, second header are equipped with the coolant liquid, still include:
The heat exchange clapboards are positioned between the first collecting box and the second collecting box, are arranged on two sides of each battery core in a bonding mode, the bottom of each heat exchange clapboard is communicated with the first collecting box, the top of each heat exchange clapboard is communicated with the second collecting box, and a bent flow channel is arranged in each heat exchange clapboard;
One end of the return pipe is communicated with the side edge of the first collecting box, the other end of the return pipe is correspondingly communicated with the side edge of the second collecting box, and the liquid pump is arranged on the return pipe and is used for conveying cooling liquid in the first collecting box into the second collecting box;
And the cooling liquid in the second collecting box flows into the first collecting box through each heat exchange baffle plate under the driving of gravity, the cooling liquid in the first collecting box flows back into the second collecting box through a return pipe under the action of a liquid pump, and a circulation loop is formed between the first collecting box and the second collecting box by the cooling liquid, so that each battery core maintains an isothermal state.
As a further improvement of the invention, the top of each heat exchange baffle is provided with a first interface, the bottom of each heat exchange baffle is provided with a second interface, and the upper end of the bent runner is connected with the first interface, and the lower end of the bent runner is connected with the second interface.
As a further improvement of the invention, the first collecting box is provided with backflow interfaces at intervals, and the backflow interfaces are correspondingly connected with the second interfaces of the heat exchange clapboards; a plurality of water outlet connectors are arranged at one side of the second collecting box at intervals, and the first interfaces of the heat exchange partition boards of the water outlet connectors are correspondingly connected.
As a further improvement of the invention, sealing rings are respectively arranged at the connection positions of the upper end and the lower end of the bent runner and the first interface and the second interface.
As a further improvement of the invention, the water outlet joint is connected with the first joint through a hose, and is fixed at the joint by using a nut.
As a further improvement of the invention, the water outlet joints are arranged at one side of the second collecting box at equal heights.
As a further improvement of the invention, the second connectors comprise two second connectors which are respectively arranged at two sides of the bottom end of each heat exchange partition board, and two curved flow passages are formed in the heat exchange partition boards between the first connectors and the two second connectors.
As a further development of the invention, two sets of return lines and a liquid pump are included.
As a further improvement of the present invention, the second header is mounted with a heat exchanger having heat radiating fins at the top or a resistance wire heater at the bottom.
As a further improvement of the invention, the width of the second header is smaller than the width of the battery cell.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention comprises a plurality of battery cores which are arranged in parallel, a plurality of heat exchange baffle plates are arranged between two adjacent battery cores in a fitting way, a bent flow channel is arranged in each heat exchange baffle plate, a first collecting box is arranged at the bottom of each battery core, a second collecting box is arranged at the top of each battery core, cooling liquid is arranged in each first collecting box and each second collecting box, each heat exchange baffle plate is respectively communicated with the first collecting box and the second collecting box, a return pipe and a liquid pump are also connected between the first collecting box and the second collecting box, under the action of gravity, the cooling liquid in each second collecting box flows into the first collecting box from each heat exchange baffle plate, the cooling liquid in the first collecting box flows back into the second collecting box through the return pipe under the action of the liquid pump, and a circulation loop is formed between the first collecting box and the second collecting box, so that each battery core maintains an isothermal state, and the risk of losing control of a battery Bao Re is reduced.
(2) According to the invention, the two water tanks, the heat exchange partition plate, the return pipe, the liquid pump and other parts are integrated in the battery pack, and the four surfaces of each single battery core are surrounded by liquid, so that the temperature of each battery core can be effectively maintained in an equal state during working, the fireproof and explosion-proof effects are good, the internal structure of the battery pack is compact, and the space is saved.
Drawings
FIG. 1 is an exploded view of a first embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the upper header in the first embodiment of the invention;
FIG. 3 is a diagram showing a structure of connection between a battery core and a heat exchange separator in a first embodiment of the present invention;
FIG. 4 is a schematic illustration of the connection of the upper header to the lower header in a first embodiment of the invention;
FIG. 5 is a schematic view of a heat exchange separator according to a first embodiment of the present invention;
FIG. 6 is a cross-sectional view of a heat exchange separator in a first embodiment of the invention;
FIG. 7 is an enlarged view of FIG. 1 at A;
FIG. 8 is a schematic illustration of the connection of an upper header to a lower header in a second embodiment of the invention;
FIG. 9 is a schematic diagram showing the distribution of the first outlet connector and the inlet connector of the upper header and the second outlet connector of the lower header in the second embodiment of the present invention;
FIG. 10 is a diagram showing a structure of connection between a battery cell and a heat exchange separator according to a second embodiment of the present invention;
FIG. 11 is a schematic view of a heat exchange separator according to a second embodiment of the present invention;
Fig. 12 is a cross-sectional view of a heat exchange separator in a second embodiment of the invention.
In the figure: 1. a second header; 11. a first water outlet joint; 12. a water inlet joint;
2. A first header; 21. a reflow interface; 22. a second water outlet joint;
3. a battery core; 31. a positive electrode; 32. a negative electrode;
4. a heat exchange partition plate; 41. a first interface; 42. a second interface; 43. a flow passage;
5. a return pipe; 6. a liquid pump; 7. a battery box; 8. a seal ring; 9. and (3) a hose.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.
Example 1
As shown in fig. 1, the invention relates to a battery pack with a self-temperature-equalization heat management device, which mainly comprises a battery box 7, a second collecting box 1, a first collecting box 2, a battery core 3, a heat exchange partition board 4, a return pipe 5 and a liquid pump 6.
The battery box 7 is a box body with an opening at the upper part, a first collecting box 2 is placed in the box body of the battery box 7, a plurality of battery cores 3 are placed on the first collecting box 2, the battery cores 3 are arranged in parallel and at intervals, a second collecting box 1 is arranged at the top of the battery cores 3, namely, the battery cores 3 are arranged between the first collecting box 2 and the second collecting box 1 in parallel and at intervals, the first collecting box 2 is positioned below the battery cores 3, the second collecting box 1 is positioned above the battery cores 3, a cavity structure is arranged inside the first collecting box 2 and the second collecting box 1, and cooling liquid is filled in the cavity structure;
A plurality of heat exchange clapboards 4 are also arranged between the first collecting box 2 and the second collecting box 1, the heat exchange clapboards 4 are also arranged at intervals, the heat exchange clapboards 4 are arranged on two sides of each battery core 3 in a fitting way, a bent flow channel 43 is arranged in each heat exchange clapboard 4, the bottom of each heat exchange clapboard 4 is communicated with the first collecting box 2, and the top of each heat exchange clapboard 4 is communicated with the second collecting box 1; the cooling liquid in the second collecting box 1 can automatically flow into the first collecting box 2 through the flow channels 43 of each heat exchange baffle plate 4 under the driving of gravity; it should be noted that, the term "under gravity driving" in the present application means that the cooling liquid flows downwards under the action of gravity, and compared with the cooling liquid flowing by the liquid pump 6, the power requirement is reduced, but the situation that the flow rate of the cooling liquid is increased and the internal circulation is accelerated by increasing the power of the liquid pump 6 under the condition that the rapid temperature equalization is required is not excluded, and the flow rate flowing through each flow channel 43 can be distributed more uniformly by utilizing the self-flowability of the cooling liquid, so that the temperature equalization effect is better.
In addition, as shown in fig. 3, a return pipe 5 and a liquid pump 6 are further arranged between the first collecting tank 2 and the second collecting tank 1, one end of the return pipe 5 is communicated with the upper edge or side edge of the first collecting tank 2, the other end is correspondingly communicated with the side edge of the second collecting tank 1, the liquid pump 6 is arranged in the middle of the return pipe 5 and is used for providing power for the return pipe 5 and conveying the cooling liquid in the first collecting tank 2 into the second collecting tank 1;
In the use process, because the cooling liquid in the second collecting box 1 flows into the first collecting box 2 from the heat exchange baffle plates 4 under the action of gravity, and because the flow channels 43 of the heat exchange baffle plates 4 are arranged in a bent shape, the area of the cooling liquid flowing through each heat insulation plate is larger, so that the contact area between each heat insulation plate through which the cooling liquid flows and each battery core 3 is also larger, a large amount of heat of the battery core 3 can be taken away, and the cooling liquid flowing from top to bottom takes away the heat and flows into the first collecting box 2.
The cooling liquid in the first collecting box 2 flows back to the second collecting box 1 through the backflow pipe 5 under the action of the liquid pump 6, the cooling liquid with the heat of each battery core 3 is uniformly mixed in the first collecting box 2 and the second collecting box 1, the first collecting box 2 and the second collecting box 1 are respectively arranged at the bottom and the top of each battery core 3, four surfaces of six surfaces of each battery core 3 are respectively contacted with the first collecting box 2, the second collecting box 1 and the heat exchange baffle plate 4, and the cooling liquid forms a circulation loop among the first collecting box 2, the heat exchange baffle plate 4 and the second collecting box 1, so that the cooling liquid flowing through the first collecting box 2, the second collecting box 1 and the heat exchange baffle plate 4 is in an isothermal state, namely, the four surfaces of each battery core 3 can exchange heat with the isothermal cooling liquid, and each battery core 3 further maintains the isothermal state (isothermal state).
As shown in fig. 5-6, specifically, the top of each heat exchange separator 4 is provided with a first interface 41, the bottom is provided with a second interface 42, the upper end of the flow channel 43 is connected with the first interface 41, and the lower end is connected with the second interface 42, i.e. the first interface 41 and the second interface 42 are respectively communicated with the inlet and the outlet of the flow channel 43. And the first port 41 is provided with external threads.
Specifically, as shown in fig. 2 and 4, a plurality of backflow interfaces 21 are arranged on the first header 2 at intervals, and each backflow interface 21 is correspondingly connected with the second interface 42 of each heat exchange partition board 4; a plurality of first water outlet connectors 11 are arranged at one side of the second collecting box 1 at intervals, and the first interfaces 41 of the heat exchange partition plates 4 of the first water outlet connectors 11 are connected in one-to-one correspondence; the first water outlet joint 11 is also provided with external threads.
A second water outlet 22 is provided on one side or edge of the first header 2, and each return connection 21 is provided opposite the other side or edge of the first header 2. The second collecting box 1 is provided with a water inlet joint 12 corresponding to one side or edge of a second water outlet joint 22 of the first collecting box 2, two ends of a return pipe 5 are respectively connected with the water inlet joint 12 and the second water outlet joint 22, and a plurality of first water outlet joints 11 are oppositely arranged on the other side of the second collecting box 1 of the water inlet joint 12.
Specifically, as shown in fig. 7, sealing rings 8 are respectively provided at the connection of the upper end of the flow channel 43 and the first port 41 and the connection of the lower end of the flow channel and the second port 42, so as to prevent the coolant from seeping out at the connection.
Specifically, each first water outlet joint 11 is connected with each first joint 41 through a hose 9, and is fixed at the connection position by using a nut.
Specifically, the first water outlet connectors 11 are arranged at the same height on one side of the second header 1, so as to ensure that the cooling liquid in the second header 1 can uniformly flow into the heat exchange partition plates 4 through the first water outlet connectors 11, so as to ensure the uniformity of heat exchange of the battery cores 3.
Aiming at the common problems of unreliable sealing and leakage of cooling liquid in the industry, the application adopts a mode that each heat exchange partition plate 4 is welded at most (the second connector 42 and the reflux connector 21 can be communicated by adopting a hose 9 and a connector), and the heat exchange partition plates 4 and the two current collecting water tanks are communicated in the mode of the most mature threaded connection and the sealing gasket, so that the manufacturing cost (high welding difficulty and high cost) can be reduced, and a safer and more reliable heat management device can be obtained.
Example 2
As shown in fig. 8-12, the difference from the first embodiment is that two second connectors 42 are provided at the bottom of each heat exchange partition board 4, the two second connectors 42 are respectively provided at two sides of the bottom of each heat exchange partition board 4, two curved flow channels 43 are provided in each heat exchange partition board 4, that is, one flow channel 43 is formed in each heat exchange partition board 4 between the first connector 41 and one of the second connectors 42, the second flow channel 43 is formed in each heat exchange partition board 4 between the first connector 41 and the other second connector 42, and the upper ports of the two flow channels 43 are connected with the first connector 41.
The first connectors 41 are located at the middle position of the top of each heat exchange partition board 4, correspondingly, the arrangement positions of the first water outlet connectors are changed compared with the first embodiment, the first water outlet connectors are arranged at the middle position of the bottom of the second collecting box 1 at intervals, and each first water outlet connector is connected with each first connector 41 in a one-to-one correspondence manner; correspondingly, the arrangement position of the reflux interfaces 21 is correspondingly changed, the reflux interfaces 21 are respectively distributed on the two side edges of the first collecting box 2 in opposite directions,
The difference from the first embodiment is that the second embodiment is provided with two groups of return pipes 5 and liquid pumps 6, and the two groups of return pipes 5 and liquid pumps 6 are arranged between the first collecting tank 2 and the second collecting tank 1 and are used for communicating the first collecting tank 2 with the second collecting tank 1; the two groups of return pipes 5 and the liquid pump 6 are symmetrically arranged.
The first interface 41 is arranged at the middle position of the top of the heat exchange partition board 4, the second interface 42 is two, the first interface 41 and the second interface 42 are welded with the current collecting water tanks by adopting pre-buried welding flux and then melting the welding flux through a high-temperature furnace, and after the sealing effect is detected, the battery core 3 is plugged between the welded two heat exchange partition boards 4 between the two current collecting water tanks from the side face. (the welding quality requirement of the joint is higher in this way, welding spots cannot be damaged when the battery core 3 is plugged in the later stage, and the assembly difficulty is slightly higher than that of the first embodiment, but the method also has the effects of an upper collecting water tank and active flow distribution by utilizing the self weight of liquid.) at this time, the return pipe 5 and the liquid pump 6 can be installed after the battery core 3 is assembled, and in addition, the process of plugging the battery core 3 on the side surface can be used for filling heat-conducting glue between the heat exchange partition plate 4 and the battery core 3 after the battery core 3 is filled in a preset position.
The invention is characterized in that the top of each battery core 3 is provided with a second collecting box 1, the bottom of each battery core is provided with a first collecting box 2, the two are communicated through a return pipe 5, and liquid in the first collecting box 2 is pumped to the second collecting box 1 through the return pipe 5 by adopting a liquid pump 6.
On the other hand, the second header 1 is provided with a plurality of first water outlet connectors 11, the first header 2 is provided with a plurality of backflow interfaces 21, then a plurality of heat exchange baffles 4 are arranged between the second header 1 and the first header 2, the heat exchange baffles 4 are arranged on two sides of each battery core 3 in a fitting way, a bent flow channel 43 is arranged in the heat exchange baffles 4, and the first interfaces 41 which are respectively communicated with two ends of the flow channel 43 and are arranged upwards, and the second interfaces 42 which are arranged downwards. The second port 42 is communicated with the reflow port 21 (preferably welded by pre-buried solder and then melted), the first port 41 is communicated with the water outlet joint through a hose 9, and the hose 9 is connected with the first port 41 and the water outlet joint by adopting a mode of combining a sealing gasket and a nut for screw fastening.
Normally, the liquid pump 6 only needs to pump liquid from the first collecting box 2 to the second collecting box 1, the liquid can actively flow through the heat exchange partition plates 4 from the second collecting box 1 under the driving of dead weight, and finally the liquid is gathered to the first collecting box 2, the heat exchange partition plates 4 are attached to the battery core 3, and the liquid exchanges heat with the battery core 3 through the flow channel 43 in the downward flowing process. Meanwhile, if more efficient and rapid heat exchange is needed, the power or gear of the liquid pump 6 can be increased, so that the flow of liquid changes from active flow to superimposed passive flow, and the heat exchange efficiency can be improved after the flow rate is increased.
In the invention, the heat exchange medium, namely the liquid is in a closed environment, and the circulation formed inside is mainly used for balancing the temperature among the battery cores 3, so that the situation that the temperature of the single battery core 3 is obviously different from that of other battery cores 3 can be effectively avoided, and the self-temperature balancing is realized. Meanwhile, the second header 1 and/or the first header 2 may exchange heat with the outside to realize refrigeration or heating, for example, a heat exchanger (not shown) with heat dissipation fins is attached to the upper side of the second header 1, or a resistance wire heater (not shown) is mounted to the lower side of the first header 2.
In any embodiment, in order to facilitate connection between the positive electrode 31 and the negative electrode 32 of each battery cell 3, the width of the second header 1 may be reduced appropriately, that is, the width of the second header 1 is smaller than the width of the battery cell 3, preferably, the width of the second header 1 is smaller than the distance between the positive electrode and the negative electrode on the battery cell 3, so as to avoid the positive electrode 31 and the negative electrode 32 of each battery cell 3 being blocked due to the too wide width of the second header 1, which results in difficult assembly.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. The utility model provides a battery package with from samming temperature management device, has placed first header including top open-ended battery case, battery incasement, and a plurality of battery core parallel placement is in on the first header to and place the second header at a plurality of battery core tops, first header, second header are equipped with the coolant liquid, its characterized in that still includes:
The heat exchange clapboards are positioned between the first collecting box and the second collecting box, are arranged on two sides of each battery core in a bonding mode, the bottom of each heat exchange clapboard is communicated with the first collecting box, the top of each heat exchange clapboard is communicated with the second collecting box, and a bent flow channel is arranged in each heat exchange clapboard;
The liquid pump is arranged on the return pipe and is used for conveying the cooling liquid in the first collecting box into the second collecting box;
the cooling liquid in the second collecting box flows into the first collecting box through each heat exchange baffle plate under the driving of gravity, the cooling liquid in the first collecting box flows back into the second collecting box through a return pipe under the action of a liquid pump, and a circulation loop is formed between the first collecting box and the second collecting box by the cooling liquid, so that each battery core maintains an isothermal state;
The top of each heat exchange partition board is provided with a first interface, the bottom of each heat exchange partition board is provided with a second interface, the upper end of each bent runner is connected with the first interface, and the lower end of each bent runner is connected with the second interface;
the first collecting box is provided with backflow interfaces at intervals, and the backflow interfaces are correspondingly connected with the second interfaces of the heat exchange clapboards; a plurality of first water outlet connectors are arranged at one side of the second collecting box at intervals, and the first interfaces of the heat exchange partition boards of the first water outlet connectors are correspondingly connected;
sealing rings are respectively arranged at the joints of the upper end and the lower end of the bent runner with the first interface and the second interface;
the first water outlet joint is connected with the first connector through a hose and is fixed at the joint by using a nut.
2. The battery pack with self-leveling heat management arrangement as recited in claim 1 wherein each of the first water outlet connectors is disposed on one side of the second header.
3. The battery pack with the self-leveling heat management device according to claim 1, wherein the second connectors comprise two second connectors, the two second connectors are respectively arranged at two sides of the bottom end of each heat exchange partition board, and two curved flow channels are formed in the heat exchange partition board between the first connector and the two second connectors.
4. The battery pack with self-leveling heat management device as recited in claim 2, comprising two sets of return lines and a liquid pump.
5. A battery pack with self-leveling heat management arrangement as in any one of claims 1-4 wherein a heat exchanger with heat dissipating fins is mounted on top of the second header or a resistance wire heater is mounted on bottom of the first header.
6. The battery pack with self-leveling heat management arrangement as recited in claim 5 wherein the width of the second header is less than the width of the battery cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311457595.9A CN117393899B (en) | 2023-11-03 | 2023-11-03 | Battery pack with self-temperature-equalization heat management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311457595.9A CN117393899B (en) | 2023-11-03 | 2023-11-03 | Battery pack with self-temperature-equalization heat management device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117393899A CN117393899A (en) | 2024-01-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106025435A (en) * | 2016-07-26 | 2016-10-12 | 李清雪 | Power battery cooling system |
| CN116345000A (en) * | 2023-03-07 | 2023-06-27 | 哈尔滨工程大学 | Battery module, power battery pack and cooling control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105977579B (en) * | 2016-07-26 | 2018-06-01 | 张福谦 | A kind of temperature control type power battery pack |
| CN114734778B (en) * | 2022-04-13 | 2024-04-16 | 浙江银轮机械股份有限公司 | Integrated modularized whole-vehicle thermal management system |
| CN116080333B (en) * | 2022-04-28 | 2024-03-19 | 比亚迪股份有限公司 | Integrated module for vehicle thermal management system, vehicle thermal management system and vehicle |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025435A (en) * | 2016-07-26 | 2016-10-12 | 李清雪 | Power battery cooling system |
| CN116345000A (en) * | 2023-03-07 | 2023-06-27 | 哈尔滨工程大学 | Battery module, power battery pack and cooling control method |
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