CN211605362U

CN211605362U - Battery thermal management device

Info

Publication number: CN211605362U
Application number: CN202020122712.1U
Authority: CN
Inventors: 李剑波
Original assignee: Ganzhou Yipeng Energy Technology Co ltd
Current assignee: Ganzhou Yipeng Energy Technology Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-09-29
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a battery heat management device is provided with power battery group, heating element and fixed subassembly. The PTC heating element is electrified to generate heat, so that the heat conducting plate is heated, the heat conducting plate can transfer the heat to the cooling liquid in the circulating channel and the single batteries, the heating of each single battery is completed, and the performance of the battery in a low-temperature environment is ensured; meanwhile, as the circulation channels are communicated with each other, when the PTC heating element on a single battery fails and cannot heat the battery, the cooling water with higher temperature on the single battery with the normal working of the PTC heating element can enter the circulation channel on the failed single battery, so that the failed single battery can be heated, the service life of the power battery pack is prolonged, and the overall discharge performance of the power battery pack is improved; the arrangement of the heat preservation cover increases the heating efficiency of the PTC element to the battery; the arrangement of the fixing component and the arrangement of the locking hole enable maintenance workers to quickly complete the replacement of the PTC element.

Description

Battery thermal management device

Technical Field

The utility model relates to a heat management device technical field especially relates to a battery heat management device.

Background

Nowadays, energy conservation and environmental protection are subjects advocated together in the world, and pure electric vehicles will become the inevitable trend of the development of the automobile industry in the future. As a convenient tool for riding instead of walk, the battery performance of the automobile determines the driving mileage of the automobile, plays an important role in determining the overall performance of the electric automobile, and is one of the core components of the electric automobile. It should be understood that the environmental temperature has a great influence on the performance of the battery, and the battery is subjected to an excessive or insufficient environmental temperature. At present, three heating modes, namely heating film heating, PTC heating and liquid heating, can be considered to heat the battery, and the battery is radiated by adopting a water cooling mode or an air cooling mode.

Firstly, the existing battery heating mode generally sets independent battery heating modules on each single battery, and each battery heating module is used for heating each single battery one by one, so that when a single battery heating module breaks down, the battery corresponding to the broken battery module cannot be heated, the inconsistency of the battery pack is increased, and the service life and the overall charge and discharge performance of the battery pack are influenced; secondly, in the current PTC heating mode, a PTC element is adopted to heat a heat conducting plate, and the heat is conducted to the battery through the heat conducting plate, but the heat conducting plate is exposed in the air, so that a large amount of heat on the heat conducting plate can be also transferred to the external atmospheric environment, a large part of heat generated by the PTC is directly lost to the outside, and the heat efficiency is low; furthermore, when the PTC heating element is damaged, it is often difficult to detach the PTC heating element from the heat conducting plate, which makes it difficult for a maintenance worker to replace the PTC heating element, and is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, provide a battery heat management device, this battery heat management device not only can improve the life and the whole discharge performance of group battery, can also increase the heating efficiency of PTC component to the battery, can also change PTC heating element fast simultaneously.

The purpose of the utility model is realized through the following technical scheme:

a battery thermal management device comprising:

the power battery pack comprises a plurality of single batteries, and the single batteries are arranged side by side;

the heating assembly comprises a plurality of heat conducting plates, a plurality of PTC heating elements and a plurality of heat preservation covers, wherein each heat conducting plate is arranged on each single battery in a one-to-one correspondence mode, each heat conducting plate is provided with a PTC installation groove, a sliding groove, a locking hole and a circulation channel, each PTC heating element is arranged in each PTC installation groove in a one-to-one correspondence mode and is connected with a power supply, each circulation channel is communicated with each other, and each heat preservation cover is arranged on each heat conducting plate in a one-to-one correspondence mode; and

the fixing component comprises a plurality of sliding supports, a plurality of jacking parts and a plurality of fixing screws, wherein the sliding supports are arranged in the sliding grooves in a one-to-one corresponding mode, fixing holes are formed in the sliding supports, the jacking parts are arranged on the sliding supports in a one-to-one corresponding mode, the jacking parts are used for jacking the PTC heating elements, the end parts of the fixing screws penetrate through the fixing holes in a one-to-one corresponding mode, and the end parts of the fixing screws are in threaded connection with the locking holes in a one-to-one corresponding mode.

In one embodiment, each of the supporting portions is provided with an elastic protrusion portion, and each of the elastic protrusion portions is configured to support the PTC heating element against each other.

In one embodiment, in one of the sliding supports, the sliding support includes a sliding ball, a connecting member and a fixing ring, the sliding ball is slidably disposed in the sliding groove, the connecting member is respectively connected to the sliding ball and the fixing ring, and the fixing hole is located on the fixing ring.

In one embodiment, the sliding bracket further comprises a reinforcing rib, and the reinforcing rib is arranged on the connecting piece.

In one embodiment, the sliding ball, the connecting member, the fixing ring and the reinforcing rib are integrally formed.

In one embodiment, the heat-conducting plate has an axisymmetric structure.

In one embodiment, the thickness of the propping part is 0.25 mm-0.55 mm.

In one embodiment, the PTC mounting groove has a rectangular cross-section.

In one embodiment, the heat-insulating cover is provided with a round corner.

In one embodiment, each PTC heating element is provided with a conductive electrode piece, and each conductive electrode piece is connected to a power supply.

Compared with the prior art, the utility model discloses advantage and beneficial effect below having at least:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a battery thermal management device according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the battery thermal management device of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a fixing assembly according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the battery thermal management apparatus 10 includes a power battery pack 100, a heating assembly 200 and a fixing assembly 300, wherein the heating assembly 200 and the fixing assembly 300 are disposed on the power battery pack 100.

Thus, it should be noted that the power battery pack 100 is used for providing power to external electrical appliances; the heating assembly 200 is used for heating the power battery pack 100; the fixing assembly 300 plays a role of fixing.

Referring to fig. 1, the power battery pack 100 includes a plurality of unit batteries 110, and the unit batteries 110 are arranged side by side.

As such, it should be noted that each of the single batteries 110 is used for providing power to an external electrical appliance.

Referring to fig. 1 and 2, the heating assembly 200 includes a plurality of heat-conducting plates 210, a plurality of PTC heating members 220, and a plurality of heat-insulating covers 230, wherein the heat-conducting plates 210 are disposed on the respective unit batteries 110 in a one-to-one correspondence, each heat-conducting plate 210 is formed with a PTC mounting groove 211, a sliding groove 212, a locking hole 213, and a circulation passage 214, the PTC heating members 220 are disposed in the PTC mounting grooves 211 in a one-to-one correspondence, the PTC heating members 220 are connected to a power source, the circulation passages 214 are communicated with each other, and the heat-insulating covers 230 are disposed on the heat-conducting.

Thus, it should be noted that the heat conducting plate 210 is tightly attached to the single battery, and the heat conducting plate 210 is used for transferring heat to the cooling liquid in the circulation channel 214 and the single battery; the PTC heating member 220 is used to heat the heat conductive plate 210; the heat-insulating cover 230 is used for preventing a large amount of heat on the heat-conducting plate 210 from being lost to the external environment; the PTC mounting groove 211 is used to mount the PTC heating member 220; the sliding groove 212 is used for guiding the sliding bracket to slide along a preset track; the locking hole 213 plays a role of fixing and locking the fixing member 300; the circulation passage 214 functions to circulate the cooling liquid.

Referring to fig. 2 again, the fixing assembly 300 includes a plurality of sliding brackets 310, a plurality of supporting portions 320 and a plurality of fixing screws 330, wherein the sliding brackets 310 are slidably disposed in the sliding grooves 212 in a one-to-one correspondence manner, each sliding bracket 310 is provided with a fixing hole 311, each supporting portion 320 is disposed on each sliding bracket 310 in a one-to-one correspondence manner, each supporting portion 320 is configured to support against the PTC heating element 220, ends of the fixing screws 330 are correspondingly disposed through the fixing holes 311, and ends of the fixing screws 330 are correspondingly screwed with the locking holes 213.

Thus, it should be noted that the sliding bracket 310 functions to support and fix the supporting portion 320; the supporting portion 320 serves to limit the PTC heating element 220; the fixing screw 330 is used to fix the sliding bracket 310 on the heat conducting plate 210; the fixing hole 311 plays a role of fixing.

Next, it should be noted that, in the practical application process, when the PTC heating element 220 needs to be fixed on the heat conducting plate 210, the PTC heating element 220 is inserted into the PTC mounting groove 211, then the end of the fixing screw 330 passes through the fixing hole 311, and then the screw thread portion of the fixing screw 330 is screwed into the locking hole 213, so that the propping portion 320 and the PTC heating element 220 prop against each other, and the mounting and fixing of the PTC heating element 220 is completed. When the PTC heating member 220 needs to be detached from the heat conducting plate 210, the fixing screw 330 is detached, then the sliding bracket 310 is rotated to a certain angle, and the sliding bracket 310 is slid along the sliding groove 212, so that the supporting portion 320 is away from the PTC heating member 220, and the PTC heating member 220 is taken out, thereby completing the detachment of the PTC heating member 220. In conclusion, the replacement and maintenance of the PTC heating member 220 are very convenient, and the quick replacement of the PTC heating member 220 is realized.

In addition, it should be noted that the circulation channels 214 communicate with a pump-out end of a water pump of an electric vehicle, and a BMS system of the electric vehicle is used to control the operation of the water pump so that the coolant can sequentially flow through the respective circulation channels 214.

In summary, after the BMS system of the electric vehicle detects that the heat conduction plate 210 on the single battery does not heat the battery, the BMS system drives the water pump of the electric vehicle to work, so that the coolant with higher temperature can transfer heat to the heat conduction plate 210 with heating failure, thereby making the temperatures of the single batteries 110 equal as much as possible, further improving the uniformity of the batteries, finally prolonging the service life of the battery pack and enhancing the overall charge and discharge performance of the battery pack.

Referring to fig. 3, each of the supporting portions 320 is provided with an elastic protrusion 340, and each of the elastic protrusions 340 is used for supporting the PTC heating element 220.

Thus, it should be noted that the elastic protrusion 340 has certain elasticity to prevent direct contact with the PTC heating element 220, so that the supporting portion 320 and the PTC heating element 220 are worn away from each other, thereby improving the durability of the battery thermal management device.

Referring to fig. 3 again, in a sliding bracket 310, the sliding bracket 310 includes a sliding ball 311, a connecting member 312 and a fixing ring 313, the sliding ball 311 is slidably disposed in the sliding groove 212, the connecting member 312 is respectively connected to the sliding ball 311 and the fixing ring 313, and the fixing hole 311 is located on the fixing ring 313.

Thus, it should be noted that the sliding ball 311 can slide in the sliding groove 212, and meanwhile, since the sliding ball 311 is spherical as a whole, the sliding ball 311 can rotate in the sliding groove 212, so as to drive the connecting element 312 and the fixing ring 313 to rotate together relative to the heat conducting plate 210, so that the fixing hole 311 can be aligned with the locking hole 213; the connecting piece 312 is used for connecting the sliding ball 311 and the fixing ring 313; the fixing ring 313 serves as a fixing.

Referring to fig. 3 again, the sliding bracket 310 further includes a reinforcing rib 314, and the reinforcing rib 314 is disposed on the connecting member 312.

As such, it should be noted that the reinforcing ribs 314 serve to increase the mechanical strength of the sliding bracket 310, thereby improving the durability of the sliding bracket 310.

Referring to fig. 3 again, the sliding ball 311, the connecting member 312, the fixing ring 313 and the reinforcing rib 314 are integrally formed.

In this way, the sliding ball 311, the connector 312, the fixing ring 313, and the reinforcing rib 314 are formed integrally, and the mechanical strength of the sliding bracket 310 can be further improved.

Referring to fig. 1, the heat-conducting plate 210 has an axisymmetric structure.

In this way, it should be noted that the heat conducting plate 210 is arranged in an axisymmetric structure, so that the heat conducting plate 210 can heat the single battery 110 more uniformly.

Referring to fig. 3 again, the thickness of the supporting portion 320 is 0.25mm to 0.55 mm.

In this way, by setting the thickness of the abutting portion 320 to 0.25mm to 0.55mm, the weight of the abutting portion 320 can be reduced as much as possible while ensuring the mechanical strength of the abutting portion 320.

Referring again to fig. 2, the PTC mounting groove 211 has a rectangular cross-section.

Thus, it should be noted that the cross-section of the PTC mounting groove 211 is provided in a rectangular shape so that the PTC heating member 220 can be inserted into the PTC mounting groove 211.

Referring to fig. 1 again, the heat-retaining cover 230 is provided with a rounded portion 231.

In this manner, the rounded portion can prevent the edge of the heat insulating cover 230 from being damaged by stress concentration.

Referring to fig. 2 again, each PTC heating element 220 is provided with a conductive plate 221, and each conductive plate is connected to a power supply.

As such, it should be noted that the conductive pole pieces are used to transmit external current to the PTC heating member 220 so that the PTC heating member 220 can generate heat.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A battery thermal management device, comprising:

2. The battery thermal management apparatus according to claim 1, wherein each of the abutting portions is provided with an elastic protrusion portion, and each of the elastic protrusion portions is adapted to abut against the PTC heating member.

3. The battery thermal management apparatus of claim 1, wherein in one of the sliding brackets, the sliding bracket comprises a sliding ball, a connecting member and a fixing ring, the sliding ball is slidably disposed in the sliding groove, the connecting member is respectively connected with the sliding ball and the fixing ring, and the fixing hole is located on the fixing ring.

4. The battery thermal management apparatus of claim 3, wherein the sliding bracket further comprises a stiffener disposed on the connector.

5. The battery thermal management apparatus of claim 4, wherein the sliding ball, the connector, the retaining ring, and the stiffener are of an integrally formed construction.

6. The battery thermal management device of claim 1, wherein the thermally conductive plate is an axisymmetric structure.

7. The battery thermal management device of claim 1, wherein the thickness of the raised portion is in the range of 0.25mm to 0.55 mm.

8. The battery thermal management apparatus of claim 1, wherein the PTC mounting slot has a rectangular cross-section.

9. The battery thermal management apparatus of claim 1, wherein a rounded portion is provided on the heat retention cover.

10. The battery thermal management device according to claim 1, wherein each PTC heating element is provided with a conductive pole piece, and each conductive pole piece is connected to a power supply.