CN219801023U

CN219801023U - New energy battery liquid cooling device and battery cell module

Info

Publication number: CN219801023U
Application number: CN202321055540.0U
Authority: CN
Inventors: 张义
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-10-03
Anticipated expiration: 2033-05-05

Abstract

The utility model provides a new energy battery liquid cooling device and a battery core module, and belongs to the technical field of new energy batteries. The liquid cooling device comprises a bottom plate and a plurality of longitudinal heat exchange plates. The bottom plate is provided with an inner cavity, a water inlet joint and a water outlet joint which are communicated with the inner cavity are arranged on the bottom plate, the longitudinal heat exchange plates are vertically connected to the bottom plate, a water inlet and a water outlet which are communicated with the inner cavity are arranged on the longitudinal heat exchange plates, a heat exchange runner with two ends communicated with the water inlet and the water outlet is arranged inside the longitudinal heat exchange plates, and a plurality of longitudinal heat exchange plates are arranged in parallel at intervals. By adopting the new energy battery liquid cooling device and the battery cell module, the problem that the normal charge and discharge of the new energy battery are affected due to the trigger power-off protection caused by the excessively high or excessively low temperature of the battery system due to low heat exchange temperature equalizing efficiency in the related technology can be solved.

Description

New energy battery liquid cooling device and battery cell module

Technical Field

The utility model relates to the technical field of new energy batteries, in particular to a new energy battery liquid cooling device and a battery cell module.

Background

In the field of new energy lithium batteries, because the battery can release a large amount of heat in the course of working, if not to its cooling treatment, can cause the battery temperature too high and trigger the protection, can't carry out charge and discharge. Meanwhile, in the case of low ambient temperature, the battery system is also triggered to be protected due to the excessively low temperature, so that it is necessary to heat-treat it. Therefore, in the new energy lithium battery system, a thermal management system is usually matched. One of the most commonly used thermal management systems is a liquid cooling system, which can keep the temperature of the environment where the battery system is used at a constant value, so as to avoid the situation that the battery system is not charged or discharged due to power-off protection triggered by overhigh or overlow temperature.

In the related art, for a long battery cell module, a liquid cooling plate formed by extruding or stamping brazing is arranged at the bottom of a battery cell arranged in parallel, an external water supply pipeline is connected with a water inlet and a water outlet of the liquid cooling plate to form a cooling liquid circulation, and the cooling liquid flowing in a runner in the liquid cooling plate is used for exchanging heat with the battery cell to realize heat exchange and temperature equalization.

The liquid cooling plate adopts a heat exchange temperature equalization mode in the related technology, and usually only exchanges heat with the contact surface at the bottom of the single battery cell, so that the heat exchange area is small, and the temperature between the cooling liquid and the single battery cell is difficult to conduct rapidly. The heat exchange temperature of the existing battery cell module is uniform, the prevention effect of thermal runaway accidents and low-temperature protection triggering is poor, and the normal charge and discharge work of the new energy battery is affected.

Disclosure of Invention

The embodiment of the utility model provides a new energy battery liquid cooling device and a battery core module, which can solve the problem that the normal charge and discharge of a new energy battery are affected due to the fact that the power-off protection is triggered due to the fact that the temperature of a battery system is too high or too low due to low heat exchange temperature equalizing efficiency in the related technology. The technical scheme is as follows:

in a first aspect, an embodiment of the present utility model provides a new energy battery liquid cooling device, including: a bottom plate and a plurality of longitudinal heat exchange plates,

the bottom plate is provided with an inner cavity, the bottom plate is provided with a water inlet joint and a water outlet joint which are communicated with the inner cavity, the longitudinal heat exchange plates are vertically connected to the bottom plate, the longitudinal heat exchange plates are provided with a water inlet and a water outlet which are communicated with the inner cavity, the inside of each longitudinal heat exchange plate is provided with a heat exchange runner, two ends of each heat exchange runner are communicated with the water inlet and the water outlet, and the longitudinal heat exchange plates are arranged at intervals in parallel.

Optionally, the water inlet joint and the water outlet joint are arranged at two ends of the bottom plate, and the plurality of longitudinal heat exchange plates are arranged between the water inlet joint and the water outlet joint.

Optionally, a heat dissipation air duct is arranged in the inner cavity, and the heat dissipation air duct penetrates through the inner cavity and is communicated with two ends of the bottom plate.

Optionally, the heat dissipation wind channel set up in the middle part of inner chamber and with the inner chamber is kept apart into first cavity and second cavity, be provided with on the bottom plate respectively with first cavity with two the water inlet joint and two that the second cavity corresponds go out the water joint.

Optionally, a plurality of guide posts are disposed in the first cavity and the second cavity, the guide posts are perpendicular to the heat dissipation air duct and are arranged at intervals in parallel, and the water inlets and the water outlets of the longitudinal heat exchange plates are located between the guide posts.

Optionally, with first cavity with the second cavity intercommunication advance water joint with go out water joint all set up in the water conservancy diversion post is kept away from the one end in heat dissipation wind channel.

Optionally, the longitudinal heat exchange plate comprises a first plate body and a second plate body, the first plate body and the second plate body are both provided with runner grooves, the first plate body and the second plate body are welded in an involution manner, and the runner grooves on the first plate body and the second plate body are formed into the heat exchange runner in an involution manner.

Optionally, the bottom plate and the plurality of longitudinal heat exchange plates are copper pieces.

In a second aspect, an embodiment of the present utility model further provides a battery cell module, including the new energy battery liquid cooling device of the first aspect, and further including a plurality of single battery cells, where the plurality of single battery cells are sequentially installed between the plurality of longitudinal heat exchange plates, and the bottom is connected with the bottom plate.

Optionally, a pole protection cover is arranged at the top of each two adjacent longitudinal heat exchange plates, and a positive pole hole and a negative pole hole are formed in the pole protection cover.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

when the battery pack is assembled and manufactured, an assembly gap is reserved between the plurality of longitudinal heat exchange plates vertically connected to the bottom plate, a plurality of single battery cells can be sequentially inserted between two adjacent longitudinal heat exchange plates, and the side parts and the bottom parts of the single battery cells can be fixedly connected with the longitudinal heat exchange plates and the bottom plate through coating heat conducting glue. When the single battery cell is conducted to conduct charge and discharge, the single battery cell can be connected with an external liquid cooling circulation system through a water inlet connector and a water outlet connector on the bottom plate, cooling liquid is input into the inner cavity, the inner cavity is filled with the cooling liquid and then is injected into heat exchange flow channels of the plurality of longitudinal heat exchange plates through water inlets at the top, and cooling liquid in the inner cavity is discharged through the water outlet connector together after flowing back through the water outlet, so that cooling liquid circulation is realized. The flowing cooling liquid is utilized to exchange heat with the side part and the bottom three end surfaces of the single battery cells, and the principle that heat is diffused from high to low is utilized to realize the integral heat dissipation or heating of the plurality of single battery cells. Compared with the prior art, the method for carrying out liquid cooling heat exchange by only arranging the replacement hot plate at the bottom of the battery cell module has the advantages that the heat exchange area is larger, the temperature conduction is faster and more uniform, the power-off protection can be effectively prevented from being triggered due to the fact that the temperature of a battery system is too high or too low due to low heat exchange temperature equalization efficiency, and the new energy battery can be guaranteed to carry out normal charge and discharge work in extreme weather.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a new energy battery liquid cooling device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a cover of a base plate according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of a base plate according to an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a longitudinal heat exchange plate according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a second plate body of the longitudinal heat exchange plate according to an embodiment of the present utility model;

fig. 6 is a schematic partial structure of a battery cell module according to an embodiment of the utility model.

In the figure:

1-a bottom plate; 1 a-lumen; 1 b-a first cavity; 1 c-a second cavity; 1A-a cover; 1B-a plate body; 2-a longitudinal heat exchange plate; 2 a-a first plate; 2 b-a second plate; 3-monomer battery cells; 4-pole protective cover; 11-a water inlet joint; 12-a water outlet joint; 13-a heat dissipation air duct; 14-a flow guiding column; 15-a first through hole; 16-a second through hole; 21-a water inlet; 22-water outlet; 23-heat exchange flow channels; 41-positive post holes; 42-negative electrode column hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of a new energy battery liquid cooling device according to an embodiment of the present utility model. Fig. 2 is a schematic structural view of a cover of a base plate according to an embodiment of the present utility model. Fig. 3 is a schematic structural view of a plate body of the base plate according to an embodiment of the present utility model. Fig. 4 is a schematic perspective view of a longitudinal heat exchange plate according to an embodiment of the present utility model. Fig. 5 is a schematic structural view of a second plate body of the longitudinal heat exchange plate according to an embodiment of the present utility model. As shown in fig. 1 to 5, the present utility model provides a new energy battery liquid cooling apparatus, which comprises a bottom plate 1 and a plurality of longitudinal heat exchange plates 2, through practice.

Wherein, the bottom plate 1 is provided with an inner cavity 1a, and the bottom plate 1 is provided with a water inlet joint 11 and a water outlet joint 12 which are communicated with the inner cavity 1 a. The longitudinal heat exchange plates 2 are vertically connected to the bottom plate 1, a water inlet 21 and a water outlet 22 which are communicated with the inner cavity 1a are arranged on the longitudinal heat exchange plates 2, a heat exchange runner 23 with two ends communicated with the water inlet 21 and the water outlet 22 is arranged inside the longitudinal heat exchange plates 2, and a plurality of the longitudinal heat exchange plates 2 are arranged in parallel at intervals.

In the embodiment of the utility model, when the battery pack is assembled and manufactured, an assembly gap is formed between the plurality of longitudinal heat exchange plates 2 vertically connected to the bottom plate 1, a plurality of single battery cells can be sequentially inserted and arranged between two adjacent longitudinal heat exchange plates 2, and the side parts and the bottom parts of the single battery cells can be respectively connected and fixed with the longitudinal heat exchange plates 2 and the bottom plate 1 through coating heat conducting glue. When the single battery cell is conducted to perform charge and discharge operation, the single battery cell can be connected with an external liquid cooling circulation system through the water inlet joint 11 and the water outlet joint 12 on the bottom plate 1, cooling liquid is input into the inner cavity 1a, the inner cavity 1a is filled with the cooling liquid and then is injected into the heat exchange flow channels 23 of the plurality of longitudinal heat exchange plates 2 through the water inlets 21 at the top, and the cooling liquid flows back through the water outlets 22 and is discharged through the water outlet joint 12 along with the cooling liquid in the inner cavity 1a, so that cooling liquid circulation is realized. The flowing cooling liquid is utilized to exchange heat with the side part and the bottom three end surfaces of the single battery cells, and the principle that heat is diffused from high to low is utilized to realize the integral heat dissipation or heating of the plurality of single battery cells. Compared with the prior art, the method for carrying out liquid cooling heat exchange by only arranging the replacement hot plate at the bottom of the battery cell module has the advantages that the heat exchange area is larger, the temperature conduction is faster and more uniform, the power-off protection can be effectively prevented from being triggered due to the fact that the temperature of a battery system is too high or too low due to low heat exchange temperature equalization efficiency, and the new energy battery can be guaranteed to carry out normal charge and discharge work in extreme weather.

Alternatively, the water inlet joint 11 and the water outlet joint 12 are disposed at both ends of the bottom plate 1, and the plurality of longitudinal heat exchange plates 2 are disposed between the water inlet joint 11 and the water outlet joint 12. Illustratively, in the embodiment of the present utility model, the water inlet joint 11 and the water outlet joint 12 are respectively disposed at two ends of the bottom plate 1 in the length direction, so that the cooling liquid injected from the water inlet joint 11 can flow through the plurality of longitudinal heat exchange plates 2 in sequence and circulate through the heat exchange channels 23 in the plurality of longitudinal heat exchange plates 2, thereby ensuring the smoothness of the circulation of the cooling liquid.

Optionally, a heat dissipation air duct 13 is disposed in the inner cavity 1a, and the heat dissipation air duct 13 penetrates through the inner cavity 1a and is communicated with two ends of the bottom plate 1. In the embodiment of the utility model, the heat exchange circulation is performed between the cooling liquid and the single battery cell, and meanwhile, the heat dissipation air duct 13 can be ventilated into the heat dissipation air duct 13 through the openings at the two sides of the bottom plate 1, and the environment fresh air or the temperature-regulated cold and hot air is utilized to perform further heat exchange with the cooling liquid after heat exchange in the inner cavity 1a, so that the temperature of the cooling liquid is always kept uniform, and the heat exchange and temperature uniformity performance of the new energy battery liquid cooling device is further improved.

Optionally, the heat dissipation air duct 13 is disposed in the middle of the inner cavity 1a and separates the inner cavity 1a into a first cavity 1b and a second cavity 1c, and two water inlet connectors 11 and two water outlet connectors 12 corresponding to the first cavity 1b and the second cavity 1c respectively are disposed on the bottom plate 1. In the embodiment of the utility model, the heat dissipation air duct 13 is arranged at the center line of the bottom plate 1 and divides the inner cavity 1a into two cavities, wherein the first cavity 1b and the second cavity 1c respectively and independently circulate cooling liquid through the corresponding water inlet joint 11 and the water outlet joint 12, and a plurality of longitudinal heat exchange plates 2 are arranged above the two cavities, so that two groups of module structures stacked and arranged by a plurality of single battery cells can be assembled simultaneously and subjected to heat exchange and temperature equalization respectively, and the adaptability of the new energy battery liquid cooling device is effectively improved.

Optionally, a plurality of flow guiding columns 14 are respectively arranged in the first cavity 1b and the second cavity 1c, the plurality of flow guiding columns 14 are arranged at intervals in parallel and perpendicular to the heat dissipation air duct 13, and the water inlets 21 and the water outlets 22 of the plurality of longitudinal heat exchange plates 2 are respectively positioned between the plurality of flow guiding columns 14. Illustratively, the flow guiding columns 14 are arranged along a direction perpendicular to the heat dissipation air duct 13, and the two ends of the flow guiding columns are spaced from the inner side wall of the inner cavity bottom plate 1 and the heat dissipation air duct 13, a plurality of flow channels are further defined by the flow guiding columns 14 in the cavity spaces of the first cavity 1b and the second cavity 1c, and the water inlets 21 and the water outlets 22 of the plurality of longitudinal heat exchange plates 2 are respectively arranged above the flow channels. Through the water conservancy diversion of a plurality of water conservancy diversion posts 14, the cooling liquid in the inner chamber 1a can smoothly stable get into the heat transfer runner 23 in every vertical heat transfer board 2 and circulate, has further improved the heat transfer samming performance of new energy battery liquid cooling device.

Optionally, the water inlet joint 11 and the water outlet joint 12 which are communicated with the first cavity 1b and the second cavity 1c are both arranged at one end of the flow guiding column 14 away from the heat dissipation air duct 13. Illustratively, in the embodiment of the present utility model, the water inlet 21 of the longitudinal heat exchange plate 2 is close to the side wall of the bottom plate 1, and the water outlet 22 is close to the heat dissipation air duct 13 in the extending direction of the guide post 14. The cooling liquid injected from the water inlet joint 11 flows into the flow channel formed by the flow guide column 14 from one end of the flow guide column 14 near the inner side wall of the bottom plate 1, circulates through the heat exchange flow channel 23 in the longitudinal heat exchange plate 2, and flows out from one end of the flow guide column 14 near the heat dissipation air channel 13. At this time, the heat-exchanged cooling liquid can perform secondary heat exchange with the heat dissipation air duct 13, so that the temperature uniformity when the cooling liquid continuously flows out of the inner cavity 1a is ensured, the temperature rise is reduced, and the heat exchange temperature uniformity performance of the new energy battery liquid cooling device is further improved.

Illustratively, in the embodiment of the present utility model, the base plate 1 is also formed by a structure in which the cover 1A and the plate 1B are welded together. Wherein the cover body 1A is provided with a groove with a certain depth, and the bottom of the groove is provided with a first through hole 15 which is used for being communicated with a water inlet 21 and a water outlet 22 of the longitudinal heat exchange plate 2, and a second through hole 16 which is used for being communicated with the water inlet joint 11 and the water outlet joint 12. And a plurality of the guiding columns 14 and the heat dissipation air channels 13 are integrally welded on the plate body 1B. After the cover body 1A and the plate body 1B are covered and welded, the groove formed on the cover body 1A forms a space of the inner cavity 1A.

Optionally, the longitudinal heat exchange plate 2 includes a first plate body 2a and a second plate body 2b, the first plate body 2a and the second plate body 2b are both provided with runner grooves, the first plate body 2a and the second plate body 2b are welded in an involution manner, and the runner grooves on the first plate body 2a and the second plate body 2b are formed into a heat exchange runner 23 in an involution manner. Illustratively, in the embodiment of the present utility model, the longitudinal heat exchange plate 2 is formed by welding two symmetrical first plate bodies 2a and second plate bodies 2b with the bottom plate 1 after being welded by butt welding. By adopting the split structural design, the forming processing and the subsequent assembly of the runner grooves for forming the heat exchange runner 23 are convenient, the processing efficiency is effectively improved, and the manufacturing cost is reduced.

Optionally, the bottom plate 1 and the plurality of longitudinal heat exchanger plates 2 are copper pieces.

Fig. 6 is a schematic partial structure of a battery cell module according to an embodiment of the utility model. As shown in fig. 6, the embodiment of the utility model further provides a battery cell module, which comprises the new energy battery liquid cooling device shown in fig. 1 to 5, and further comprises a plurality of single battery cells 3, wherein the single battery cells 3 are sequentially arranged among the plurality of longitudinal heat exchange plates 2, and the bottom of the single battery cells is connected with the bottom plate 1. Illustratively, in the embodiment of the present utility model, the new energy battery liquid cooling device is used to assemble a plurality of stacked single battery cells 3 to form a battery cell module. The plurality of single battery cells 3 can be directly bonded and fixed by using heat conducting glue after being assembled in place, and the module structure fixedly installed in the battery pack is formed together. Compared with the conventional battery cell module in the related art, the battery cell module does not need to integrally fix the single battery cells 3 by utilizing structures such as end plates, binding bands and the like after being stacked, so that the processing steps are reduced, the production efficiency of the new energy battery is further improved, and the manufacturing cost is reduced.

Optionally, a pole protection cover 4 is arranged at the top of two adjacent longitudinal heat exchange plates 2, and a positive pole hole 41 and a negative pole hole 42 are arranged on the pole protection cover 4. In the embodiment of the present utility model, after each single cell 3 is assembled between two adjacent longitudinal heat exchange plates 2, a pole protection cover 4 may be covered above, and when the single cell 3 is further fixed, the pole protection cover 4 may cover and protect the positive and negative poles above the single cell 3 laterally, and through the positive pole hole 41 and the negative pole hole 42, connection and conduction between the single cell and elements such as external copper bars are ensured, so that the assembly stability and safety are improved.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of one of the components. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model, but rather, the utility model is to be construed as limited to the appended claims.

Claims

1. The utility model provides a new forms of energy battery liquid cooling device which characterized in that includes: a bottom plate (1) and a plurality of longitudinal heat exchange plates (2),

the bottom plate (1) is provided with an inner cavity (1 a), the bottom plate (1) is provided with a water inlet joint (11) and a water outlet joint (12) which are communicated with the inner cavity (1 a), the longitudinal heat exchange plates (2) are vertically connected to the bottom plate (1), the longitudinal heat exchange plates (2) are provided with a water inlet (21) and a water outlet (22) which are communicated with the inner cavity (1 a), the inside of the longitudinal heat exchange plates (2) is provided with heat exchange flow passages (23) with two ends communicated with the water inlet (21) and the water outlet (22), and the longitudinal heat exchange plates (2) are arranged at intervals in parallel.

2. The new energy battery liquid cooling device according to claim 1, wherein the water inlet joint (11) and the water outlet joint (12) are arranged at two ends of the bottom plate (1), and the plurality of longitudinal heat exchange plates (2) are arranged between the water inlet joint (11) and the water outlet joint (12).

3. The new energy battery liquid cooling device according to claim 1, wherein a heat dissipation air duct (13) is arranged in the inner cavity (1 a), and the heat dissipation air duct (13) penetrates through the inner cavity (1 a) and is communicated with two ends of the bottom plate (1).

4. The new energy battery liquid cooling device according to claim 3, wherein the heat dissipation air duct (13) is disposed in the middle of the inner cavity (1 a) and isolates the inner cavity (1 a) into a first cavity (1 b) and a second cavity (1 c), and the two water inlet connectors (11) and two water outlet connectors (12) corresponding to the first cavity (1 b) and the second cavity (1 c) respectively are disposed on the bottom plate (1).

5. The new energy battery liquid cooling device according to claim 4, wherein a plurality of flow guiding columns (14) are arranged in the first cavity (1 b) and the second cavity (1 c), the plurality of flow guiding columns (14) are perpendicular to the heat dissipation air duct (13) and are arranged at intervals in parallel, and the water inlets (21) and the water outlets (22) of the plurality of longitudinal heat exchange plates (2) are located between the plurality of flow guiding columns (14).

6. The new energy battery liquid cooling device according to claim 5, wherein the water inlet joint (11) and the water outlet joint (12) which are communicated with the first cavity (1 b) and the second cavity (1 c) are both arranged at one end of the flow guiding column (14) far away from the heat dissipation air duct (13).

7. The new energy battery liquid cooling device according to any one of claims 1 to 6, wherein the longitudinal heat exchange plate (2) comprises a first plate body (2 a) and a second plate body (2 b), flow passage grooves are formed in the first plate body (2 a) and the second plate body (2 b), the first plate body (2 a) and the second plate body (2 b) are welded in a butt joint mode, and the flow passage grooves in the first plate body (2 a) and the second plate body (2 b) are formed in a butt joint mode to form the heat exchange flow passage (23).

8. The new energy battery liquid cooling device according to any one of claims 1 to 6, wherein the bottom plate (1) and the plurality of longitudinal heat exchange plates (2) are copper products.

9. A battery cell module comprising the new energy battery liquid cooling device according to any one of claims 1 to 8, further comprising a plurality of single battery cells (3), wherein the single battery cells (3) are sequentially installed between the plurality of longitudinal heat exchange plates (2) and the bottom is connected with the bottom plate (1).

10. Cell module according to claim 9, wherein two adjacent longitudinal heat exchanger plates (2) are provided with a pole protection cover (4) on top, and wherein the pole protection cover (4) is provided with a positive pole hole (41) and a negative pole hole (42).