CN208422996U

CN208422996U - Battery case

Info

Publication number: CN208422996U
Application number: CN201820855998.7U
Authority: CN
Inventors: 康笑天; 叶剑飞; 李铁; 姜玉雁
Original assignee: Shenzhen Maian Thermal Control Technology Co Ltd
Current assignee: Shenzhen Maian Thermal Control Technology Co Ltd
Priority date: 2018-04-28
Filing date: 2018-06-04
Publication date: 2019-01-22
Anticipated expiration: 2028-06-04

Abstract

The utility model discloses a kind of battery cases, and the cabinet including being suitable for accommodating battery modules, the cabinet includes bottom wall (24) and side wall (22)；It is characterized in that, heat pipe (3) are provided in the cabinet, first side surface of the bottom wall (24) towards the cabinet of the heat pipe (3) and heating device (7) thermal coupling, the second side surface of the bottom wall (24) away from the cabinet of the heat pipe (3) suitable for the bottom thermal coupling that is contained in the intracorporal battery modules of the case；Hollow structure is formed inside the side wall (22) of the cabinet to accommodate coolant liquid, and the side wall (22) of the cabinet and the heat pipe (3) thermal coupling.The battery case reduces coolant liquid and flows into the risk that the inscribed touching battery modules of cabinet cause it short-circuit, and improves the efficiency of battery modules in heating compartment.

Description

Battery case

Technical field

The utility model belongs to power battery field, and in particular to battery thermal management and power battery box.

Background technique

New energy electric motor vehicle guarantees power supply configured with power battery.Power battery includes cabinet and is integrated in cabinet Interior multiple battery modules.Since the charge-discharge magnification to power battery requires constantly promotion and service life and the work of battery Efficiency and its temperature regime are closely related, and therefore, Battery case not only needs to play fixed and protection internal cell mould group work With, will also for internal cell mould group carry out it is high temperature heat dissipation (ambient temperature is higher, when battery modules operating temperature can be excessively high) and low Temperature heating (ambient temperature is relatively low, when battery modules operating temperature can be too low)., current Battery case mostly by steel plate weld and At weight is big, and this not only lowers the energy densities of battery system, and increase vehicle load.On the other hand, has electricity Pond case product does not match perfect thermal management device of battery mostly, it is difficult to battery modules be made to maintain 5~35 DEG C of good temperature Under environment, thus battery is likely to occur leakage, burning, explosion, or can not charge and discharge.

Liquid cooling pipeline is arranged usually in cabinet as the heat dissipation of each battery modules in some battery case products on the market, prevents major Excessive temperature differentials between battery modules temperature anomaly or each battery modules.There are following main for the thermal management device of battery of this liquid cooling Drawback: 1, liquid cooling plate is embedded in battery case, and is typically arranged between battery bottom and box baseplate.As a result, when long Between using the commissure of rear liquid cooling pipeline there are leakage hidden danger, and then coolant liquid may contact the shells of battery modules and cause its short Safety problem occurs for road；2, it when liquid cooling system heats low temperature battery, needs that coolant temperature is first heated to certain temperature, ability Battery is set to heat up by coolant liquid, this causes power consumption big and the temperature rise rate of battery is low.

Utility model content

The utility model proposes a kind of battery cases, at least partly to solve the above problems.

One side according to the present utility model proposes a kind of battery case, the cabinet including being suitable for accommodating battery modules, described Cabinet includes bottom wall and side wall.It is provided with heat pipe in the cabinet, the first of the bottom wall towards the cabinet of the heat pipe Second side surface of side surface and heating device thermal coupling, the bottom wall away from the cabinet of the heat pipe is suitable for and is contained in institute State the bottom thermal coupling of the intracorporal battery modules of case；The interior of the cabinet forms hollow structure to accommodate coolant liquid, and And the side wall of the cabinet and the heat pipe thermal coupling.

Another aspect according to the present utility model, the heat pipe include the bottom being laid on the bottom wall of the cabinet and from The both ends of bottom are directed away from the bending part that the direction of the bottom wall of the cabinet extends；The bottom of the heat pipe and the heating fill Set thermal coupling, and the bending part of the heat pipe extended from bottom both ends all with the side wall thermal coupling of the cabinet.

Another aspect according to the present utility model is equipped with multiple positioning regions, each institute on the side wall or bottom wall of the cabinet It states heat pipe and is arranged in the cabinet by being located at the positioning region of its two sides.

Another aspect according to the present utility model, the interior of the cabinet are harmonica-shaped tube structure, the harmonica-shaped tube knot Structure extends along the direction for the bottom wall for being parallel to the cabinet.

Another aspect according to the present utility model, the side wall include the first side wall and second sidewall, the first side wall The nozzle of one end the hollow knot so that the first side wall is connect by connecting tube with the nozzle of one end of the second sidewall Structure and the hollow structure of second sidewall are in fluid communication, and have inlet in the other end of the first side wall, in second sidewall The other end has liquid outlet.

Another aspect according to the present utility model, the battery case further include connecting the first side wall and second sidewall The both ends of first end wall and the second end wall, the first side wall and second sidewall extend beyond first end wall and the second end wall Protruding portion is formed, the inlet, liquid outlet and nozzle are all located on protruding portion.

Another aspect according to the present utility model, the interior one or more battery that is equipped with of the cabinet place position, each battery It places position and is suitable for placing one or more battery mould group, one or more heat pipes are provided in each arranging batteries position, often The overall width of one or more of heat pipes in a arranging batteries position and the width of the arranging batteries position match.

Another aspect according to the present utility model is provided with heat-insulated between the heating device and the bottom wall of the cabinet Device.

Another aspect according to the present utility model, the heat pipe and the bottom for being contained in the intracorporal battery modules of the case are logical The side wall and the heat pipe for crossing heat-conducting interface material thermal coupling and/or the cabinet pass through heat-conducting interface material thermal coupling.

Another aspect according to the present utility model is provided with the heating device in each arranging batteries position, and each The heating device is equipped with the temperature sensor for monitoring the temperature of corresponding heating device.

The battery case of the utility model is crucial management device with heat pipe, liquid cooling channel be arranged in box side rather than The bottom of box, to significantly reduce pipeline once rupturing, coolant liquid can flow into the inscribed electric shock pond of cabinet and cause its short circuit Risk.In addition, only battery modules need to can be realized to coolant liquid in two liquid cooling placed in series of side wall surface due to using heat pipe High efficiencies of heat transfer, this avoids the designs of the series and parallel structure of liquid cooling pipeline complexity, shorten liquid cooling loop length, reduce work Skill cost greatly improves the reliability of heat management system.Simultaneously as heating device works as needs directly with heat pipe thermal coupling When heating battery modules, heating device, which generates heat, can be directly transferred to battery modules quickly and efficiently without being subjected to cooling Liquid enables battery modules to be rapidly heated and the heating efficiency of heating device improves.

Battery case according to the present utility model is suitable for accommodating for example, electric vehicle and provides the power battery of power, and can Heat management function is provided for power battery, to improve the working environment of power battery, to improve the charge and discharge effect of power battery Rate.

Detailed description of the invention

Fig. 1 is the structural schematic diagram one according to the battery case of the utility model embodiment；

Fig. 2 is the structural schematic diagram two according to battery case provided by the embodiment of the utility model；

Fig. 3 is the explosive view of Fig. 1；

Fig. 4 is the explosive view of Fig. 3.

Wherein: 1, upper box；2, lower box；3, heat pipe；21, arranging batteries position；22, side wall；23, end wall；24, bottom wall； 25, step；31, the bending part of heat pipe；32, the bottom of heat pipe；4, positioning region；5, connecting tube；6, temperature sensor；7, heating dress It sets；8, inlet；9, liquid outlet；10, heat-proof device；221, nozzle；222, protruding portion；311, step surface；312, bending part Upper section；313, the lower section of bending part.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain this Utility model is not used to limit the utility model.

Also referring to Fig. 1 to Fig. 4, now battery case provided by the utility model is illustrated.Battery case, including pairing Upper box 1 and lower box 2.Lower box 2 includes bottom wall 24, side wall 22 and end wall 23.Side wall 22 and end wall 23 be connected with each other with Around bottom wall 24.Hollow internal structure is formed in side wall 22 to accommodate coolant liquid.

It in one embodiment, is harmonica-shaped tube structure, runner of the harmonica-shaped tube as coolant liquid inside two sidewalls 22.Mouth organ Pipe structure extends along the direction for the bottom wall 24 for being parallel to cabinet.The first side wall both ends in two sidewalls 22, which are respectively provided with, collects it In runner inlet 8 and nozzle 221, the second sidewall both ends in two sidewalls 22, which are respectively provided with, collects going out for runner therein Liquid mouth 9 and nozzle 221.The nozzle 221 of one end of the nozzle 221 and second sidewall of one end of the first side wall passes through outside cabinet Connecting tube 5 connects, so that the hollow structure of the first side wall and the hollow structure of second sidewall are in fluid communication.In the another of the first side wall The inlet 8 of one end can be connected to external coolant line with the liquid outlet 9 of the other end in second sidewall to recycle side wall 22 Hollow structure in coolant liquid.

In one embodiment, the both ends of the first side wall in two sidewalls 22 and second sidewall extend beyond end walls 23 Form protruding portion 222.Inlet 8, liquid outlet 9 and the nozzle 221 for connecting connecting tube 5 are all located at protruding portion 222.The knot Structure is convenient for facilitating landform at 22 both ends of side wall in the case where two sidewalls 22 connect to form closed box frame with end walls 23 At inlet 8, liquid outlet 9 and nozzle 221.

It should be appreciated that the stream for being used to accommodate coolant liquid in side wall can also be formed with other various forms of hollow structures Road.It is also understood that the hollow structure for accommodating coolant liquid is additionally formed in the end wall 23 of cabinet, or it is made only in two In a side wall in a side wall 22.

Upper box 1 and lower box 2 can be by aluminium alloy, titanium alloy, magnesium alloy, carbon steel, stainless steel, carbon fiber, plastics etc. Material is made.

The interior hollow section of the side wall 22 of cabinet is as the space for accommodating coolant liquid, so that coolant liquid need not additionally be laid Pipeline is conducive to the loss of weight of cabinet.In addition, the interior hollow section of side wall 22 will not be connected to inside battery case, and connect two sides The connecting tube 5 of the hollow structure of wall 22 be also it is external, there is no the risks in leak to battery case.Harmonica-shaped tube in side wall 22 Structure can not only form the side wall 22 of reinforcement, also help balanced 22 temperature of side wall, improve heat dissipation effect.

Further, Fig. 3 and Fig. 4 are please referred to, as a kind of specific embodiment of battery case provided by the utility model, It is equipped with one or more battery in lower box 2 and places position 21, each arranging batteries position 21 can place one or more battery mould group, Wherein each battery modules can be made of one or more battery cores.One heat pipe 3 is set in each arranging batteries position 21, but Multiple heat pipes 3 can be arranged side by side.Heat pipe 3 is layed in the bottom of lower box 2 along the width direction of lower box 2, including is laid on Bottom 32 on the bottom wall 24 of cabinet and the both ends from bottom are directed away from the bending that the direction of the bottom wall 24 of the cabinet extends Generally U-shaped heat pipe 3 is consequently formed in portion 31.The bottom 32 of heat pipe 3 and 7 thermal coupling of heating device, and heat pipe 3 from bottom Both ends extend bending part 31 all with 22 thermal coupling of the side wall of cabinet.

The width phase of the overall width of one or more heat pipes 3 in each arranging batteries position 21 and arranging batteries position 21 Match, so that the overall width of one or more heat pipes 3 is equal to or slightly less than the gross area of the battery modules bottom in arranging batteries position, To which heat pipe 3 and battery modules bottom have relatively large contact area, be conducive to quickly pass the heat that battery modules generate It leads in heat pipe 3, and is oriented to side wall 22 in turn, to improve radiating efficiency.

Heat pipe 3 can be centreless gravity assisted heat pipe, have core heat pipe, pulsating heat pipe, hot pressing to convert heat pipe, temperature-uniforming plate etc..Heat pipe Material can be selected from copper, copper alloy, aluminium, aluminium alloy, titanium alloy, magnesium alloy, steel, carbon fiber, quartz glass or rigid plastics. Heat pipe 3 has the good capacity of heat transmission, is also generally referred to as super heat-conductive pipe.

First side surface of the bottom wall 24 towards cabinet of heat pipe bottom 32 and heating device thermal coupling, heat pipe bottom 32 The second side surface away from the bottom wall 24 of cabinet is suitable for and the bottom thermal coupling that is contained in the intracorporal battery modules of case.When by battery When mould group is placed in arranging batteries position 21, the bottom of battery modules contacts (i.e. thermal coupling with the second side surface of heat pipe bottom 32 Close), to realize the heat transmitting between battery modules and heat pipe 3.

When battery modules (battery) temperature is excessively high needs cooling, its bottom of battery modules by with 3 bottom 32 of heat pipe (i.e. Heat pipe hot end) contact, bottom 32 of the heat from battery modules bottom conductive to heat pipe, then to 31 (heat pipe of the bending part of heat pipe Cold end), it is then conducted by the thermal coupling between heat pipe bending part 31 and wall box 22 to wall box 22, then passes through side Coolant liquid in the hollow structure of wall 22 is pulled away.The heat for as a result, being generated battery modules using the superpower capacity of heat transmission of heat pipe 3 Amount is quickly oriented to the side wall 22 of lower box 2, and most of heat is oriented to the external world by the side wall 22, guarantees good heat dissipation effect. Each arranging batteries position 21 has corresponded to a heat pipe 3, and the heat so as to generate each battery modules is quickly oriented to nowel The side wall 22 of body 2 radiates, and avoids excessive temperature differentials between each battery modules.

The both ends of heat pipe 3 are respectively formed bending part 31 and are advantageous, no matter this makes battery case by any towards heat pipe 3 Slant setting is held, the other end of heat pipe 3 is always above the bottom 32 of heat pipe.Heat pipe 3 always has a bending part 31 (i.e. cold as a result, End) be higher than its bottom 32 (i.e. hot end), this enable heat pipe 3 hot end in evaporative fluid smoothly rise to positioned at bottom 32 The bending part 31 (i.e. cold end) of top simultaneously condenses there, to guarantee that heat pipe can continue efficient heat transfer.

In one embodiment, step 25 is equipped between the side wall 22 and bottom wall 24 of lower box 2.The bending part of heat pipe 3 31 include the upper section 312 and lower section 313 connected by step surface 311.The step surface 311 of bending part 31 is bonded step 25, thus curved Folding part 31 is supported on step 25, and upper section 312 and lower section 313 are bonded with the side wall 22 of lower box 2.It is supported using step 25 curved Folding part 31 advantageously ensures that the structural stability of heat pipe 3, also improves the heat transfer efficiency between heat pipe 3 and side wall 22.

In one embodiment, the side wall 22 of lower box 2 or bottom wall 24 are equipped with multiple positioning regions 4, and each heat pipe 3 passes through Positioning region 4 positioned at its two sides is arranged in lower box 2, with realize heat pipe 3 in the intracorporal positioning of case, thus guarantee heat pipe 3 with The position corresponding relationship of battery modules.The positioning method structure is simple, and convenient for assembly, disassembly convenient for independent maintenance, replaces each heat Pipe 3.

First side surface of the bottom wall 24 towards cabinet of the bottom 32 of heat pipe 3 and 7 thermal coupling of heating device.Heating device 7 can be the heating device of electric heating device or other forms.Wherein electric heating device can be silicon rubber heating sheet, ceramics Heating sheet, polyimide heater film, graphene heating film, PTC heating sheet etc..

In one embodiment, heat-proof device 10 is provided between heating device 7 and the bottom wall 24 of cabinet.Heat-insulated dress Setting 10 is, for example, to be formed by heat-insulating heat-preserving material.Since the lower surface of heating device 7 and heat-proof device are assembled, so that heating device The heat almost all of generation reaches the bottom 32 (heat pipe hot end) of heat pipe 3, to prevent heat from leaking by cabinet bottom wall 24.

When battery modules temperature is too low to be needed to heat, the fever of heating device 7 is to directly heat the of the bottom 32 of heat pipe 3 One side surface.After 3 hot end of heat pipe is heated, the battery for being assemblied in the second side surface of heat pipe bottom 32 rapidly, is equably transferred heat to Mould group, and then realization quickly, uniformly heats up to each battery modules, without being added by the coolant liquid in heating side wall 22 Thermal cell mould group.

In one embodiment, one or more heating devices 7 can be respectively set for each heat pipe 3, so as to basis The temperature of each battery modules controls corresponding heating device 7 respectively and heats to respective battery mould group.

In one embodiment, it is additionally provided with temperature sensor 6 on each heating device 7, with each corresponding for monitoring The temperature of heating device 7.The temperature of each heating device 7 is monitored by temperature sensor 6, and temperature is cooperated by heating device 7 Sensor 6 is spent to work, can guarantee the operating temperatures of each battery modules both will not be too low and influence battery modules normal work, Not too high, so as to avoid each heating device 7, temperature is excessively high and damage heating device 7 or battery modules when heated.Together When, additionally it is possible to guarantee that the temperature difference between each battery modules is also unlikely excessive.Temperature sensor 6 may, for example, be thermal resistor or its He measures the device of temperature.

In one embodiment, heat pipe 3 passes through heat-conducting interface material with the bottom for being contained in the intracorporal battery modules of case The side wall 22 of thermal coupling and/or cabinet and heat pipe 3 pass through heat-conducting interface material thermal coupling.Heat-conducting interface material can be thermally conductive Glue, thermal conductive silicon rubber mat, heat-conducting silicone grease etc..Heat-conducting interface material can be improved the heat transference efficiency between heat pipe 3 and battery modules And the heat transference efficiency between heat pipe 3 and wall box 22.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims

1. a kind of battery case, the cabinet including being suitable for accommodating battery modules, the cabinet includes bottom wall (24) and side wall (22)；Its It is characterized in that, is provided in the cabinet heat pipe (3), the first of the bottom wall (24) towards the cabinet of the heat pipe (3) Side surface and heating device (7) thermal coupling, the second side surface of the bottom wall (24) away from the cabinet of the heat pipe (3) is suitable for With the bottom thermal coupling for being contained in the intracorporal battery modules of the case；Formed inside the side wall (22) of the cabinet hollow structure with Accommodate coolant liquid, and the side wall (22) of the cabinet and the heat pipe (3) thermal coupling.

2. battery case according to claim 1, which is characterized in that the heat pipe (3) includes the bottom for being laid on the cabinet Bottom (32) on wall (24) and the bending part extended from the direction that the both ends of bottom (32) are directed away from the bottom wall of the cabinet (31)；The bottom (32) of the heat pipe and the heating device (7) thermal coupling, and the heat pipe (3) prolongs from bottom both ends The bending part (31) stretched all with the side wall of the cabinet (22) thermal coupling.

3. battery case according to claim 2, which is characterized in that set on the side wall (22) or bottom wall (24) of the cabinet Have multiple positioning regions (4), each heat pipe (3) is arranged in the cabinet by being located at the positioning region (4) of its two sides.

4. battery case according to claim 1, which is characterized in that be harmonica-shaped tube knot inside the side wall (22) of the cabinet Structure, the harmonica-shaped tube structure extend along the direction for the bottom wall (24) for being parallel to the cabinet.

5. battery case according to claim 1, which is characterized in that the side wall (22) includes the first side wall and second side The nozzle (221) of wall, one end of the nozzle (221) and the second sidewall of one end of the first side wall passes through connecting tube (5) Connection is so that the hollow structure of the first side wall and the hollow structure of second sidewall are in fluid communication, and in the another of the first side wall One end has inlet (8), has liquid outlet (9) in the other end of second sidewall.

6. battery case according to claim 5, which is characterized in that the battery case further include connect the first side wall and The both ends of the first end wall and the second end wall (23) of second sidewall, the first side wall and second sidewall extend beyond described first End wall and the second end wall (23) form protruding portion (222), and the inlet (8), liquid outlet (9) and nozzle (221) are all located at prominent Out on portion (222).

7. battery case according to claim 1, which is characterized in that be equipped with one or more battery in the cabinet and place Position, each arranging batteries position are suitable for placing one or more battery mould group, are provided with one or more in each arranging batteries position The heat pipe (3), the overall widths of one or more of heat pipes (3) in each arranging batteries position and the arranging batteries position Width matches.

8. battery case described in any one of -7 according to claim 1, which is characterized in that the heating device (7) with it is described Heat-proof device (10) are provided between the bottom wall (24) of cabinet.

9. battery case described in any one of -7 according to claim 1, which is characterized in that the heat pipe (3) and be contained in described The side wall (22) and the heat that the bottom of the intracorporal battery modules of case passes through heat-conducting interface material thermal coupling and/or the cabinet It manages (3) and passes through heat-conducting interface material thermal coupling.

10. battery case according to claim 7, which is characterized in that be provided with the heating dress in each arranging batteries position It sets (7), and each heating device (7) is equipped with the temperature sensing for monitoring the temperature of corresponding heating device (7) Device (6).