CN213520110U

CN213520110U - Power battery pack

Info

Publication number: CN213520110U
Application number: CN202022542438.6U
Authority: CN
Inventors: 修书董; 张海建; 杨振宇; 任荣彬; 王永强
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-06-22
Anticipated expiration: 2030-11-05

Abstract

The utility model relates to a power battery package provides a cooling plate, including cooling plate (1) and a plurality of electric core (2), each electric core (2) with be equipped with PTC layer (4) between cooling plate (1) and with PTC controller (3) that PTC layer (4) are connected, PTC controller (3) can be controlled the break-make on PTC layer (4), PTC layer (4) are suitable for each electricity core (2) heating. Power battery package simple structure, small, the accuse temperature is effectual.

Description

Power battery pack

Technical Field

The utility model relates to a battery, in particular to power battery package.

Background

The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by using a motor, and meets various requirements of road traffic and safety regulations. Because the adopted electric energy is clean energy and has little influence on the environment, the electric automobile has wide prospect.

Along with the popularization of electric automobiles, the requirements of consumers on the endurance mileage and the output power of the electric automobiles are higher and higher, and the key for solving the problem is to improve the performance of a power battery. Since a power battery pack of an electric vehicle is sensitive to temperature, a thermal safety event is likely to occur if the battery temperature is not well controlled in daily use, and thus it is necessary to reduce the risk of thermal runaway by effectively controlling the battery temperature. Therefore, the conventional power battery pack is provided with a control structure capable of controlling the temperature of the power battery pack, so that the plate can be heated and cooled. But the temperature control structure of battery is more complicated among the current power battery package, and it is bulky to occupy, and temperature control is not accurate, leads to current power battery package volume great, and the structure is more complicated, and the temperature control effect is not good.

Therefore, there is a need to design a power battery pack to solve or overcome the above technical problems.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a power battery package, this power battery package simple structure, the volume is less, and it is effectual to control the temperature.

In order to achieve the above object, an aspect of the present invention provides a power battery pack, including a cooling plate and a plurality of battery cells, each battery cell with be equipped with the PTC layer between the cooling plate and with the PTC controller that the PTC layer is connected, the PTC controller can control the break-make on the PTC layer, the PTC layer is suitable for each battery cell heating.

Further, each of the battery cells is formed into a cylinder, and an axial center line of each of the battery cells is arranged in parallel along a width direction of the cooling plate.

Furthermore, the distance between the axial center lines of two adjacent battery cores is equal.

Furthermore, one surface of the cooling plate, which is close to the battery cell, is provided with an inward concave arc surface, the PTC layer is arranged in the arc surface, and the peripheral surface of the battery cell can be attached to the PTC layer.

Furthermore, the PTC layer is formed into a plurality of strip-shaped structures, and each battery cell, the PTC layer and the cambered surface are arranged in a one-to-one correspondence manner.

Furthermore, a liquid inlet and a liquid outlet are arranged on the cooling plate, a cooling path communicated with the liquid inlet and the liquid outlet is arranged in the cooling plate, and the liquid inlet and the liquid outlet are arranged in the middle area of the cooling plate.

Further, the thickness of the PTC layer is 0.1-0.3 mm.

Further, the PTC layer is glued to the cooling plate.

Still further, the power battery pack further comprises a battery management system, and the battery management system is suitable for controlling the temperature of the PTC controller and the PTC layer.

Compared with the prior art, the power battery pack has the following advantages:

(1) power battery package set up the PTC layer between cooling plate and electric core, set up the PTC controller on the PTC layer, through the connection and the disconnection on PTC controller control PTC layer, and the PTC layer can be used for heating electric core to the heating power that can change different positions through the power density who adjusts the PTC layer realizes different regional heat allotments, thereby has not only realized the heating to electric core, can also ensure the accurate control of heating position.

(2) The thickness on power battery package's PTC layer be 0.1-0.3mm, adopt to splice with cooling plate 1 and be connected to the PTC layer sets up with electric core one-to-one, occupation space not, makes power battery package's structure compacter reasonable.

Through the technical scheme, the utility model discloses a power battery package includes cooling plate and a plurality of electric core, each electric core with be equipped with the PTC layer between the cooling plate and with the PTC controller that the PTC layer is connected, the PTC controller can control the break-make on PTC layer, the PTC layer is suitable for each electric core heating. The utility model discloses a power battery package is through setting up the PTC layer between cooling plate and electric core, and the purpose that the heating power is different that reaches different positions through the power density who adjusts the PTC layer not only can realize that the PTC layer is to electric core heating, can also realize the more accurate heating effect of different positions, different temperatures to can effectively promote the work efficiency of electric core.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of an embodiment of a power battery pack according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of an embodiment of a power battery pack according to the embodiment of the present invention.

Description of reference numerals:

1 cooling plate 11 liquid inlet

12 liquid outlet 2 electric core

3 PTC controller 4 PTC layer

5 Power cord

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 and fig. 2, the utility model provides a power battery pack, including cooling plate 1 and a plurality of electricity core 2, each electricity core 2 with be equipped with PTC layer 4 between cooling plate 1 and with PTC controller 3 that PTC layer 4 is connected, PTC controller 3 can control the break-make of PTC layer 4, PTC layer 4 is suitable for each electricity core 2 heats.

The utility model discloses a be equipped with PTC layer 4 between cooling plate 1 and electric core 2, PTC layer 4 is connected with PTC controller 3, through triggering this PTC controller 3, can control the intercommunication and the disconnection on PTC layer 4. Preferably, the PTC layer 4 is connected to the cooling plate 1, and the outer peripheral surface of the battery cell 2 is attached to the PTC layer 4, so as to ensure that the heat generated by the PTC layer 4 is conducted to the battery cell 2 as much as possible, the heating rate is high, and the heat loss is small.

It should be noted that, because the characteristic curve of PTC is along with the rise of temperature, its resistance progressively increases, and then changes the heating power, plays certain self-protection function, consequently, the utility model discloses a PTC layer 4 adopts the PTC shaping, and its security is high.

Additionally, the utility model discloses a PTC layer 4 can form different positions, different heating temperature's heating effect through the power density who adjusts PTC layer 4 according to PTC's material characteristic, realizes different regional heat allotments to reach accurate heating. In order to better determine the heating temperatures required at different positions, a test is performed in advance to simulate temperature values at various positions on the battery cell 2 under various use conditions, so as to ensure temperature values to be reached by the corresponding PTC layers 4 at various positions on the battery cell 2, and thus to ensure that the temperatures required by the battery cells 2 at different positions achieve the optimal effect.

Of course, the utility model discloses a PTC layer 4 can also reach the effect that changes heating power through changing its width, increases PTC layer 4's width to can increase PTC layer 4 and electric core 2's area of contact, and then just can improve PTC layer 4's heating rate, shorten heat time, improve heating efficiency.

It should be noted here that the outside of the PTC layer 4 is protected by a PI film, and the PI film has excellent high and low temperature resistance, electrical insulation, adhesion, radiation resistance, and dielectric resistance, and can be used for a long time at a temperature range of-269 ℃ to 280 ℃, and can reach a high temperature of 400 ℃ in a short time, so that the PTC layer 4 has high insulation safety performance.

It can be understood that when the vehicle is in a charging state, the electric energy required by the PTC layer 4 of the present invention directly comes from the electric energy charged by the charging pile; when the vehicle is in a driving state, the electric energy required by the PTC layer 4 of the utility model is derived from the power supply unit of the power battery pack.

Further, each of the battery cells 2 is formed into a cylindrical body, and an axial center line of each of the battery cells 2 is arranged in parallel in a width direction of the cooling plate 1.

The utility model discloses an electricity core 2 forms to the cylinder, of course the utility model discloses an electricity core 2 is not restricted to the cylinder structure, also can be the cuboid structure, perhaps other structural style. 2 parallel arrangement of each electric core, the spatial structure in the power battery package can effectively be utilized for the spatial structure in the power battery package utilizes the maximize, thereby can make the volume of power battery package minimum, and the structure is simplest, reasonable.

Further, the distance between the axial center lines of two adjacent electric cores 2 is equal.

The distances between two adjacent electric cores 2 are equal, so that the electric cores 2 can be heated more uniformly by the PTC layers 4, and the heat influence between the electric cores 2 is minimum. Of course, according to actual requirements, the distances between the battery cells 2 may also be different, and are determined according to actual use requirements. Correspondingly, the spacing distance of the inward concave arc groove body or the rectangular groove body on the cooling plate 1 is also correspondingly changed, and the cooling plate all belong to the protection scope of the utility model.

Further, one surface, close to the battery cell 2, of the cooling plate 1 is provided with an inward concave arc surface, the PTC layer 4 is arranged in the arc surface, and the outer peripheral surface of the battery cell 2 can be attached to the PTC layer 4.

Further, the PTC layer 4 is formed into a plurality of strip structures, and each of the battery cells 2 and the PTC layer 4 are arranged in one-to-one correspondence with the arc surface.

As can be seen from fig. 2, the utility model discloses an electricity core 2 forms to the cylinder, consequently, pastes more inseparabler for making electricity core 2 and cooling plate 1 paste, and the one side that is close to electricity core 2 on the cooling plate 1 sets up to the cambered surface of inwards recessing, and this cambered surface can paste completely and lean on the outer peripheral face of electricity core 2 to can increase the area of contact of electricity core 2 with cooling plate 1, improve heating and refrigerated efficiency. Of course, the utility model discloses an electricity core 2 also can be the cuboid, correspondingly, the one side that is close to electric core 2 on the cooling plate 1 sets up to the inside recessed rectangle cell body, and PTC layer 4 then can be attached in the bottom of this rectangle cell body along the length direction of this rectangle cell body, and in this rectangle cell body was gone into to electric core 2 card, can enough locate between cooling plate 1 and electric core 2 with PTC layer 4, can also play the positioning action to electric core 2 simultaneously, all belongs to the utility model discloses a protection scope.

Further, a liquid inlet 11 and a liquid outlet 12 are arranged on the cooling plate 1, a cooling path communicated with the liquid inlet 11 and the liquid outlet 12 is arranged in the cooling plate 1, and the liquid inlet 11 and the liquid outlet 12 are arranged in the middle area of the cooling plate 1.

The utility model discloses a set up inlet 11 and liquid outlet 12 on cooling plate 1, and the inside of cooling plate 1 still is equipped with the cooling path, and inlet 11, cooling path and liquid outlet 12 intercommunication form cooling circulation route, and the coolant liquid can be through this cooling circulation route, realizes the cooling effect to electric core. As can be seen from fig. 1, the liquid inlet 11 and the liquid outlet 12 are both disposed in the central region of the cooling plate 1, and both sides of the cooling plate 1 form cooling regions for cooling the battery cells 2. It is conceivable that the inlet 11 and the outlet 12 of the present invention may be disposed at other positions of the cooling plate 1: for example, firstly, the liquid inlet 11 and the liquid outlet 12 may be respectively disposed at two side edges or two diagonal positions of the cooling plate 1, a cooling circulation path is communicated between the liquid inlet 11 and the liquid outlet 12, and the battery cell 2 is correspondingly disposed at an area except for the two ends; secondly, one of the liquid inlet 11 and the liquid outlet 12 is arranged in the central area of the cooling plate 1, the other of the liquid inlet 11 and the liquid outlet 12 is arranged on the side edge or the corner of the cooling plate 1, a cooling circulation path is communicated between the liquid inlet 11 and the liquid outlet 12, and the battery core 2 is correspondingly arranged in the areas except the two ends; thirdly, inlet 11 and liquid outlet 12 can also set up on the side of cooling plate 1, as long as can form the cooling circulation route in cooling plate 1, all belong to the utility model discloses a scope of protection.

The cooling circulation path in the cooling plate 1 may be a pipe cooling circulation or a cooling circulation formed by connecting a plurality of housing chambers.

Furthermore, the thickness of the PTC layer 4 is 0.1-0.3mm, which can ensure that the PTC layer 4 can heat the battery core 2 and does not occupy the space of the power battery pack.

Preferably, the PTC layer 4 is glued to the cooling plate 1, but the PTC layer 4 can also be connected to the cooling plate 1 in other structures, such as: firstly, a slot can be arranged on the cooling plate 1, and the PTC layer 4 can be directly inserted into the slot; secondly, a pressing plate can be arranged, the pressing plate can firmly press the PTC layer 4, and then the pressing plate is connected with the cooling plate 1 through fasteners (such as screws, bolts and the like). Of course, PTC layer 4 and cooling plate 1 can also adopt other structural style to be connected as long as with PTC layer 4 fixed connection recooling plate 1 on to can all belong to electric core 2 direct heating the utility model discloses a scope of protection.

Further, the power battery pack further comprises a battery management system, and the battery management system is suitable for controlling the temperature of the PTC controller 3 and the PTC layer 4.

According to earlier stage experiment, the requirement of the battery core 2 capable of measuring different positions for temperature is different, and the battery management system can preset the temperature of different PTC layers 4, when the external temperature is lower and the battery core 2 needs to be heated, the PTC controller 3 can be controlled to be communicated with the PTC layers 4, and the temperature of the PTC layers 4 is controlled according to the preset temperature value, so that the battery core 2 achieves the optimal heating effect. And when the external temperature is higher, the PCT controller 3 controls the PTC layer 4 to be disconnected, and directly cools the electric core 2 through the cooling circulation path in the cooling plate 1, so that the cold end control of the electric core 2 is realized, and the optimal use effect is achieved.

As above, the utility model discloses a power battery package includes cooling plate 1, a plurality of electric core 2 and battery management system, each electric core 2 with be equipped with PTC layer 4 between cooling plate 1 and with PTC controller 3 that PTC layer 4 is connected, PTC controller 3 can control the break-make on PTC layer 4, PTC layer 4 is suitable for each electricity core 2 heats. The power battery pack of the utility model has the advantages that the PTC layers 4 are arranged between the cooling plate 1 and the battery core 2, and the accurate temperature control of each PTC layer 4 is realized through the battery management system, so that the temperature of the PTC layers 4 can be controlled according to the use conditions of different parts of the battery core 2, the battery core 2 has the optimal working state, and the temperature control effect is good; and the PTC layer 4 has extremely small volume, and is arranged in the power battery pack without influencing the basic structure and the volume of the original power battery pack.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The power battery pack is characterized by comprising a cooling plate (1) and a plurality of battery cores (2), wherein a PTC layer (4) and a PTC controller (3) connected with the PTC layer (4) are arranged between each battery core (2) and the cooling plate (1), the PTC controller (3) can control the connection and disconnection of the PTC layer (4), and the PTC layer (4) is suitable for heating each battery core (2).

2. The power battery pack according to claim 1, wherein each of the battery cells (2) is formed into a cylinder, and an axial center line of each of the battery cells (2) is arranged in parallel in a width direction of the cooling plate (1).

3. The power battery pack according to claim 2, characterized in that, the distance between the axial center lines of two adjacent electric cores (2) is equal.

4. The power battery pack according to claim 2, wherein one surface of the cooling plate (1) close to the battery core (2) is provided with an inwardly concave cambered surface, the PTC layer (4) is arranged in the cambered surface, and the outer peripheral surface of the battery core (2) can be attached to the PTC layer (4).

5. The power battery pack according to claim 4, wherein the PTC layer (4) is formed into a plurality of strip-shaped structures, and each battery cell (2) and the PTC layer (4) are arranged in one-to-one correspondence with the cambered surface.

6. The power battery pack as recited in claim 1, wherein the cooling plate (1) is provided with a liquid inlet (11) and a liquid outlet (12), the cooling plate (1) is provided with a cooling path communicated with the liquid inlet (11) and the liquid outlet (12), and the liquid inlet (11) and the liquid outlet (12) are disposed in a middle region of the cooling plate (1).

7. Power battery pack according to any of claims 1 to 6, characterized in that the thickness of the PTC layer (4) is 0.1-0.3 mm.

8. Power battery pack according to any of claims 1 to 6, characterized in that the PTC layer (4) is glued to the cooling plate (1).

9. A power battery pack according to any of claims 1-6, further comprising a battery management system adapted to control the temperature of the PTC controller (3) and the PTC layer (4).