CN208173642U - Battery case, battery pack and electric car - Google Patents
Battery case, battery pack and electric car Download PDFInfo
- Publication number
- CN208173642U CN208173642U CN201721275794.8U CN201721275794U CN208173642U CN 208173642 U CN208173642 U CN 208173642U CN 201721275794 U CN201721275794 U CN 201721275794U CN 208173642 U CN208173642 U CN 208173642U
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- China
- Prior art keywords
- liquid nitrogen
- battery case
- battery
- battery pack
- runner
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
Abstract
This application discloses a kind of battery case, battery pack and electric cars, wherein battery case includes tank wall, it is provided with the liquid nitrogen runner for the liquid nitrogen that circulates in tank wall, the denitrogen relief valve that the liquid nitrogen being connected with the liquid nitrogen runner is filled with mouth and is connected with the liquid nitrogen runner is provided on the tank wall.The application fast cooling and can be such that space in case maintains under longer low temperature environment, extend the cycle charge discharge electric life of battery pack.
Description
Technical field
This application involves battery technology fields, and in particular to a kind of battery case, the battery pack for configuring the battery case, configuration should
The electric car of battery pack.
Background technique
Present electric car great development, most of lithium ion batteries for electric vehicle are used as power power supply.To ensure safety, institute
Some Li-ion batteries piles are equipped with detection battery status and carry out electronic equipment -- the management system of real-time control.Battery operation
When generate big calorimetric, increase its temperature, especially hot summer, through long-distance operation arrival charging station, internal battery pack temperature
Usually up to or higher than the maximum temperature for allowing to charge, management system protection cannot charge normal degree.Its natural cooling is waited,
The time can be very long under the hot sun.The good method that the time improves efficiency is saved if can be quickly cooled down and be undoubtedly one.
Xiao Kejian etc. proposes the side that fast cooling is realized with the vaporization heat absorption of liquid nitrogen in CN2011110110666.9
Method.Cooling rate is fast, at low cost, is a good method.They use special cooling container, built-in cooling duct, inlet switch valve,
Gate out switch valve, pressure gauge, liquid nitrogen container, liquid nitrogen pressure sensor, temperature control liquid nitrogen automatic control flow valve, liquid nitrogen pressure sensing
Device, liquid nitrogen pressure abnormal alarming device, Temperature Treatment module etc. are the fluid control systems of complete set.However this structure
It is too complicated.
In fact, the nitrogen valve one in CN2011110110666.9 is opened, and cooling duct can be full of at once.Allow nitrogen temperature
Do not allow in time with battery temperature balance, nitrogen must flow inside battery pack, so being one substantially lasting
The process of air intake-exhaust.CN2011110110666.9 will control nitrogen flow according to the temperature of battery, reach the effect for saving nitrogen
Fruit, practical significance is little, as long as input pressure is sufficiently low, makees control appropriate to discharge pressure, can reach substantially not unrestrained
The purpose taken.
Summary of the invention
The purpose of the application is：In view of the above technical problems, the application proposes that one kind fast cooling and can make in case
Space maintains the battery case under longer low temperature environment, to extend the cycle charge discharge electric life of battery pack, while also proposed one
The electric car of battery pack and configuration this battery pack of the kind configured with this battery case.
The technical solution of the application is：
A kind of battery case, including tank wall, are provided with the liquid nitrogen runner for the liquid nitrogen that circulates in the tank wall, on the tank wall
It is provided with the denitrogen relief valve that the liquid nitrogen being connected with the liquid nitrogen runner is filled with mouth and is connected with the liquid nitrogen runner.
This battery case of the application further includes following preferred embodiment based on the above technical solution：
It is additionally provided with phase-change material accommodating cavity in the tank wall, is provided with phase-change material in the phase-change material accommodating cavity.
The liquid nitrogen fills inlet and is provided with into nitrogen solenoid valve.
It is described into nitrogen solenoid valve and BMS battery management system circuit connection.
The denitrogen relief valve and it is described into nitrogen solenoid valve be check valve, and the denitrogen relief valve is provided at least
Two.
The outlet into nitrogen solenoid valve is connected at least two fluid flow tubes, and the liquid nitrogen runner is formed in the fluid flow tube
It is interior.
The aluminium alloy extrusions that the tank wall is bolted together by several pieces is formed by fixedly connecting, the type of the aluminium alloy extrusions
Chamber forms the liquid nitrogen runner and the phase-change material accommodating cavity.
The phase-change material accommodating cavity and the liquid nitrogen runner are close to arrangement.
The phase-change material accommodating cavity is arranged around the liquid nitrogen runner.
A kind of battery pack, including battery case and the battery being contained in the battery case, the battery case uses above-mentioned electricity
The structure type of pond case.
A kind of electric car, including：
Vehicle frame,
The power battery pack mounting rack being formed on the vehicle frame, and
The power battery pack being fixedly mounted on the power battery pack mounting rack；
The power battery pack uses the structure type of above-mentioned battery pack.
Preferably, being provided on the power battery pack mounting rack：
For the liquid nitrogen runner for the liquid nitrogen that circulates,
The liquid nitrogen being connected with the liquid nitrogen runner is filled with mouth, and
The denitrogen relief valve being connected with the liquid nitrogen runner
The advantages of the application is：
1, the application is at low cost and pollution-free using liquid nitrogen as refrigerant, and can quickly reduce battery pack temperature, every time
Before battery pack charging, being filled with liquid nitrogen to liquid nitrogen runner in advance using a little time cools down battery pack rapidly, that is, can avoid
Temperature is excessively high when battery pack charges, and extends the service life of battery pack.Charging just can be to electricity without occupying more time every time
Chi Bao forms fast low temperature protection, very convenient.
2, the application also closes off in battery outer box and is provided with phase-change material, and the low temperature liquid nitrogen being filled with largely absorbs phase first
The temperature for becoming material, recycle the phase-change material of low temperature lenitively in respiratory box battery heat, can either so make battery case
Interior battery maintains the state of relative low temperature for a long time, fever is generated because of charging with compensation, and can prevent battery temperature in case
Degree drastically reduces and influences battery performance.
3, pressure release denitrogen valve uses check valve, will not influence the waterproof sealing function of battery case.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to required use in embodiment description
Attached drawing be briefly described, the drawings in the following description are only some examples of the present application, skill common for this field
For art personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is mounting structure schematic diagram of the battery pack on power battery pack mounting rack in the embodiment of the present application；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the portion the X1 enlarged drawing of Fig. 1；
Fig. 4 is the portion the X2 enlarged drawing of Fig. 1；
Fig. 5 is the portion the X3 enlarged drawing of Fig. 2；
Fig. 6 is the schematic view of the mounting position into nitrogen solenoid valve；
Fig. 7 is the structure diagram of denitrogen relief valve.
Wherein：1- tank wall, 2- liquid nitrogen runner, 3- liquid nitrogen are filled with mouth, 4- denitrogen relief valve, and 5- is into nitrogen solenoid valve, 6- phase transformation
Material accommodating cavity, 7- battery, 8- power battery pack mounting rack, A- liquid nitrogen, B- phase-change material.
Specific embodiment
Above scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are for illustrating
The application and be not limited to limitation scope of the present application.Implementation condition used in the examples can be done according to the condition of specific producer
Further adjustment, the implementation condition being not specified is usually the condition in routine experiment.
Fig. 1 and Fig. 2 is this battery pack of the application applied to the knot on electric car as electric automobile power battery packet
Structure schematic diagram.Wherein, appended drawing reference 8 indicates the power battery pack mounting rack of electric car, is one of electric automobile frame
Point, which can be pure electric automobile, be also possible to oil-electric vehicle.Appended drawing reference 1 is the case of battery case
Wall, the battery in 7 battery case of appended drawing reference, the two collectively form the power battery pack of the battery car.In the present embodiment,
Battery 7 in battery case is Li-ion batteries piles comprising numerous cylinder type lithium battery monomers combined in series and parallel.
The key improvements of the present embodiment are, the liquid nitrogen runner 2 for the liquid nitrogen A that circulates, tank wall are provided in the tank wall 1
The denitrogen pressure release that the liquid nitrogen being connected with the liquid nitrogen runner 2 is filled with mouth 3 and is connected with the liquid nitrogen runner 2 is additionally provided on 1
Valve 4.
When the battery pack needs to charge, the nitrogen pipe out of liquid nitrogen bottle is plugged into the liquid nitrogen outside case in advance and is filled on mouth 3, gently
The pressure reducing valve that liquid nitrogen bottle goes out nitrogen mouth is opened in tip-tap, and pressure is transferred to 0.05MPa or so, so that the liquid nitrogen runner 2 into tank wall 1 is filled with
The liquid nitrogen of ultralow temperature.The liquid nitrogen of ultralow temperature enters in the tank wall 1 of battery case, rapidly the heat of absorption tank wall 1, in tank wall respiratory box
The heat of battery 7 makes battery in case cool down rapidly.If liquid nitrogen is gasificated into nitrogen because temperature increases, the pressure in liquid nitrogen runner 2
It will necessarily increase, when pressure is more than preset threshold, nitrogen will be excluded from denitrogen relief valve 4, to avoid air pressure in tank wall
It is excessively high and generate safety accident.The nitrogen charging process used time is extremely short, it is only necessary to can be completed within several seconds, after the completion of nitrogen charging, then to battery pack into
The problem of row charging, so avoidable battery pack temperature due to charging excessively high shortening service life of battery pack.And in battery pack
After charging complete, a liquid nitrogen can be filled into battery case tank wall again.
If the liquid nitrogen being filled in tank wall 1 directly absorbs the heat of internal cell 7, the temperature of battery 7 by tank wall
What will be declined is very fast, this is likely to result in 7 temperature of battery too low (such as subzero tens degree) and influences the charge and discharge of battery
Electrical property, for example be difficult to or can not charge.In order to avoid such problem, the present embodiment is also provided with closing in the tank wall 1
Phase-change material accommodating cavity 6, and in phase-change material accommodating cavity 6 be arranged phase-change material B.Phase-change material B is normal in the present embodiment
Lower temperature is solid-state (or liquid), can be liquid by solid-state phase changes after it absorbs enough heats.
So, the heat that phase-change material B is first absorbed into the ultra-low temperature liquid nitrogen in liquid nitrogen runner 2 makes phase-change material B
Temperature drastically reduce and remain solid-state (if phase-change material B original state is liquid, phase-change material B heat release first by
Liquid becomes solid-state, becomes low temperature solid-state after further heat release), the solid phase-change material B of low temperature lenitively absorbs relatively again
The heat of battery in case, slowly reduces the temperature of battery in case, and the battery in battery case can either so maintained for a long time
In the state of relative low temperature, making it, slowly compensation generates fever because of charging during the charging process, and can prevent battery temperature in case
Degree drastically reduces and influences battery charge and discharge performance.
When the temperature of battery pack is relatively high, phase-change material B absorbs battery pack thermal temperature and increases.Work as phase-change material
It is liquid (solid-liquid mixture) by solid-state phase changes after B is absorbed into enough heats.And the phase-change material in the phase transition process
(this self-characteristic for being phase-change material) will not be increased by only absorbing heat and temperature, can so avoid battery pack to a certain extent
Temperature is excessively high.After being filled with liquid nitrogen into tank wall, the phase-change material of liquid absorbs heat rapidly and becomes the solid forms of low temperature, is
Battery pack heat is absorbed again to be ready.
Also, the present embodiment is filled at mouth 3 in above-mentioned liquid nitrogen and is additionally provided with into nitrogen solenoid valve 5, and should be into nitrogen solenoid valve 5
Control line access the BMS battery management system of the battery pack.In filling liquid nitrogen, BMS battery management system is opened in advance should be into
Nitrogen solenoid valve 5, liquid nitrogen, which passes through into nitrogen solenoid valve 5, flows into liquid nitrogen runner 2, and after being filled with the desired amount of liquid nitrogen, solenoid valve 5 is closed, liquid
Nitrogen stops entering.Also, the charge of liquid nitrogen can be controlled by BMS battery management system, and BMS battery management system is according to case
The initial temperature of interior battery 7 controls the opening time into nitrogen solenoid valve 5, and in general, the initial temperature of battery 7 is higher in case,
Opening time into nitrogen solenoid valve 5 is longer.
In the present embodiment, above-mentioned denitrogen relief valve 4 and be check valve into nitrogen solenoid valve 5, wherein denitrogen relief valve 4 can only
Outwardly denitrogen, and allow into nitrogen solenoid valve 5 to 2 nitrogen charging of liquid nitrogen runner.
In view of denitrogen relief valve 4 play the role of to the safety of the battery pack it is vital, if denitrogen relief valve 4
Damage and cause its can not pressure release, then there are battery case explosion security risk.In this regard, we are provided with multiple denitrogen pressure releases
Valve 4, after the damage of one of denitrogen relief valve 4, there are also other denitrogen relief valves 4 normal works.
In order to reduce the temperature difference of battery 7 everywhere in battery case, the temperature uniformity of battery pack in guard box, we are best
It is respectively provided with liquid nitrogen runner 2 in each range of battery case tank wall, namely：Keep liquid nitrogen runner 2 as much as possible around battery in the case
Periphery everywhere.
In the present embodiment, the tank wall 1 of above-mentioned battery case be fixedly connected by the aluminium alloy extrusions that muti-piece is bolted together and
At, and above-mentioned liquid nitrogen runner 2 and phase-change material accommodating cavity 6 are formed using the type chamber of aluminium alloy extrusions itself.
Certainly, above-mentioned liquid nitrogen runner 2 and phase-change material accommodating cavity 6 can also use other structures form, such as：Above-mentioned
One or more fluid flow tube is connected into the outlet of nitrogen solenoid valve 5, liquid nitrogen runner 2 described in the segment dislocation using the fluid flow tube.
Preferably will to improve liquid nitrogen A in liquid nitrogen runner 2 to the heat absorption efficiency of phase-change material in phase-change material accommodating cavity 6
Phase-change material accommodating cavity 6 and liquid nitrogen runner 2 are close to arrangement.Meanwhile in order to allow liquid nitrogen A absorption phase-change material B as much as possible and
Phase-change material accommodating cavity 6 is preferably looped around 2 peripheral disposition of liquid nitrogen runner by the heat of non-tank wall or ambient enviroment.
In addition, referring again to shown in Fig. 1 and Fig. 2, power battery of the present embodiment to the electric car for installing above-mentioned battery pack
Packet mounting rack 8 has also carried out similar transformation：The liquid nitrogen runner for the liquid nitrogen A that circulates is also equipped on power battery pack mounting rack 8
2, while being provided with the liquid nitrogen being connected with the liquid nitrogen runner 2 on power battery pack mounting rack 8 and being filled with mouth (being not drawn into figure)
And the denitrogen relief valve (being not drawn into figure) being connected with the liquid nitrogen runner 2.Fig. 3 is the structural schematic diagram of denitrogen relief valve.
The liquid nitrogen of the battery pack mounting rack 8 fills the control line that inlet is also equipped with into nitrogen solenoid valve 5, into nitrogen solenoid valve 5 and accesses battery
The BMS battery management system of packet.
In this way, we can be passed through to the liquid nitrogen runner 2 of power battery pack mounting rack 8 before and after power battery pack charging
Low temperature liquid nitrogen is reduced the temperature of battery pack mounting rack 8 using liquid nitrogen, and then reduces the battery being in contact with battery pack mounting rack 8
The temperature of packet.
Above-described embodiment is only the technical concepts and features for illustrating the application, and its object is to allow people that can understand this Shen
Content please is simultaneously implemented accordingly, and the protection scope of the application can not be limited with this.It is all according to the application main technical schemes
The equivalent transformation or modification that Spirit Essence is done should all be covered within the scope of protection of this application.
Claims (12)
1. a kind of battery case, including tank wall (1), which is characterized in that be provided in the tank wall (1) for the liquid nitrogen that circulates (A)
Liquid nitrogen runner (2), be provided on the tank wall (1) liquid nitrogen being connected with the liquid nitrogen runner (2) be filled with mouth (3) and with it is described
The connected denitrogen relief valve (4) of liquid nitrogen runner (2).
2. battery case according to claim 1, which is characterized in that be additionally provided with phase-change material accommodating in the tank wall (1)
Chamber (6) is provided with phase-change material (B) in the phase-change material accommodating cavity (6).
3. battery case according to claim 1 or 2, which is characterized in that the liquid nitrogen, which is filled at mouth (3), to be provided with into nitrogen electricity
Magnet valve (5).
4. battery case according to claim 3, which is characterized in that described into nitrogen solenoid valve (5) and BMS battery management system
Circuit connection.
5. battery case according to claim 3, which is characterized in that the denitrogen relief valve (4) and described into nitrogen solenoid valve
It (5) is check valve, and the denitrogen relief valve (4) is provided at least two.
6. battery case according to claim 3, which is characterized in that the outlet into nitrogen solenoid valve (5) is connected at least
Two fluid flow tubes, the liquid nitrogen runner (2) are formed in the fluid flow tube.
7. battery case according to claim 2, which is characterized in that the aluminium that the tank wall (1) is bolted together by several pieces
Alloy profile is formed by fixedly connecting, and the type chamber of the aluminium alloy extrusions forms the liquid nitrogen runner (2) and the phase-change material holds
Set chamber (6).
8. battery case according to claim 2, which is characterized in that the phase-change material accommodating cavity (6) and the liquid nitrogen stream
Road (2) is close to arrangement.
9. battery case according to claim 7, which is characterized in that the phase-change material accommodating cavity (6) is around the liquid nitrogen
Runner (2) arrangement.
10. a kind of battery pack, including battery case and the battery being contained in the battery case, which is characterized in that the battery case
Using the structure of the battery case as described in any in claim 1-8.
11. a kind of electric car, including：
Vehicle frame,
The power battery pack mounting rack (8) being formed on the vehicle frame, and
The power battery pack being fixedly mounted on the power battery pack mounting rack；
It is characterized in that, the power battery pack uses the structure of battery pack as claimed in claim 10.
12. electric car according to claim 11, which is characterized in that be arranged on the power battery pack mounting rack (8)
Have：
For the liquid nitrogen runner for the liquid nitrogen that circulates,
The liquid nitrogen being connected with the liquid nitrogen runner is filled with mouth, and
The denitrogen relief valve being connected with the liquid nitrogen runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721275794.8U CN208173642U (en) | 2017-09-30 | 2017-09-30 | Battery case, battery pack and electric car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721275794.8U CN208173642U (en) | 2017-09-30 | 2017-09-30 | Battery case, battery pack and electric car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208173642U true CN208173642U (en) | 2018-11-30 |
Family
ID=64385678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721275794.8U Expired - Fee Related CN208173642U (en) | 2017-09-30 | 2017-09-30 | Battery case, battery pack and electric car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208173642U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799529A (en) * | 2020-09-10 | 2020-10-20 | 北京航空航天大学 | Battery thermal management system and management method based on high-thermal-conductivity phase-change material |
| CN112366386A (en) * | 2020-10-09 | 2021-02-12 | 湖北雷迪特冷却系统股份有限公司 | Cold plate with instant extremely cold safety device |
-
2017
- 2017-09-30 CN CN201721275794.8U patent/CN208173642U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799529A (en) * | 2020-09-10 | 2020-10-20 | 北京航空航天大学 | Battery thermal management system and management method based on high-thermal-conductivity phase-change material |
| CN112366386A (en) * | 2020-10-09 | 2021-02-12 | 湖北雷迪特冷却系统股份有限公司 | Cold plate with instant extremely cold safety device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181130 Termination date: 20210930 |