CN218827409U - Liquid cooling welding-free battery pack grouping structure, battery pack and container type battery system - Google Patents

Abstract

The utility model discloses a battery pack liquid-cooled non-welded group structure, a battery pack and a container battery system. The water inlet pipe, the water outlet pipe, the plug on the sealing connection assembly at the end, and the connecting pipe connecting the adjacent sealing connection assembly; each liquid cold plate is provided with a refrigerant channel, and the sealing connection assembly is used for sealing connection liquid cooling Plates and connecting pipes are used to connect adjacent sealed connection components, plus water inlet pipes, outlet pipes and plugs to form a complete battery pack liquid cooling system. The refrigerant flows in from the water inlet, enters each liquid cooling plate through the sealed connection components, and takes away The heat generated by the electric core, compared with the liquid cooling system welded into groups, the utility model has lower requirements on the production process, is easy to operate, and has good sealing performance. The electric core can be cooled by the liquid cooling plate to improve the temperature uniformity of the electric core. , Extend battery pack life.

Description

Battery pack liquid-cooled welding-free group structure, battery pack and containerized battery system

technical field

The utility model relates to the technical field of thermal management of energy storage batteries, in particular to a battery pack liquid-cooled non-welded group structure, a battery pack and a container-type battery system.

Background technique

When the energy storage battery pack is charged and discharged, a large amount of heat will be generated. In addition, the battery space is tightly arranged, and the temperature in the energy storage battery pack rises rapidly. However, the local heat in the box is difficult to be discharged evenly, and the operating environment of the battery has a large difference. The long-term operation of the battery pack in an environment with large temperature differences will lead to serious differences in the internal resistance and capacity of the batteries, which may cause some batteries to be overcharged or overdischarged, affect the performance and life of the energy storage system, and cause serious safety hazards .

In response to the above problems, we proposed a battery module structure with liquid cooling on the large side of the battery cell. The utility model patent with the application number 202210815779.7 discloses the group structure of the battery cell and the liquid cooling plate. The cooling effect is better if the liquid cooling plate is installed. However, due to the large number of liquid cooling plates, they are grouped by welding, and the structural strength is good, but the technical requirements for welding are high, and the production cost is high. Therefore, it is necessary to design a non-welding The liquid-cooled group structure ensures the cooling effect of the system while reducing the difficulty and cost of grouping. The utility model simultaneously proposes a battery pack and a container battery system.

Contents of the invention

The main purpose of the utility model is to propose a battery pack liquid-cooled non-welding group structure, battery pack and container battery system, aiming at solving the limitation of liquid-cooled welding group.

In order to achieve the above purpose, the utility model proposes the following technical solution, a battery pack liquid-cooled non-welded group structure, characterized in that:

It includes a plurality of liquid cooling plates, the lower part of which is provided with two connecting ends extending outwards,

Multiple sets of sealed connection components are arranged at the connection end, including two opposite main body parts,

The water inlet pipe is sleeved on the sealing connection assembly at the end,

The outlet pipe is sleeved on the sealing connection assembly at the end,

Connecting tubes, connecting adjacent sealed connection components,

And the plug, which is set on the sealing connection assembly at the end;

The liquid cooling plate 1 is provided with a refrigerant channel, and the refrigerant channel forms two refrigerant channel openings communicating with the outside world on the connecting end; the sealing connection assembly is arranged at the connecting end, including two Two oppositely arranged main parts, the inner surface of the main part is provided with a liquid-cooled plate groove for accommodating the connecting end, the outer surface is provided with a water channel joint, and the main part is also provided with a sealing groove, and the main part is provided with a sealing groove. There are also a plurality of connecting holes for fixedly connecting the two main body parts.

Further, a sealing ring or sealing structural glue is provided in the sealing groove.

Further, one end of the inner surface of the main body is provided with a guiding and positioning block, and the other end is provided with a guiding and positioning groove at a position corresponding thereto.

Further, the top of the guide and positioning block is provided with a fixing part extending horizontally to one side or both sides, and the guide and positioning groove has a space for accommodating the fixing part.

Further, both ends of the waterway joint and the connecting pipe are two-way water-stop quick-plug joints.

Further, the connection end is provided with a liquid-cooled plate positioning hole, and the main body is provided with a liquid-cooled plate positioning column matched with the liquid-cooled plate positioning hole.

Further, the connecting hole is provided with a threaded connecting piece.

Further, a section of bellows is provided in the middle of the connecting pipe.

Further, the utility model proposes a battery pack, including a battery case, and a battery pack liquid-cooled welding-free group structure, which is set in the battery case, including any one of the above-mentioned battery pack liquid-cooled welding-free grouping structures structure.

Further, the utility model proposes a container battery system, including the above-mentioned battery pack.

To sum up, the utility model has a simple structure. Compared with the welded group structure, the requirements for the production process are lower, the operation is convenient, and the sealing performance is better. The refrigerant enters each liquid cold plate through the sealed connection assembly, and the refrigerant flows The resistance is small and the heat dissipation effect is good, so that each cell can be cooled by the liquid cooling plate, the cooling effect is good, the temperature uniformity of the cell is effectively improved, and the life of the battery pack is extended. Moreover, the liquid cooling has a compact structure, has little influence on the volume of the battery pack, and has high promotional value.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is a schematic diagram of a three-dimensional exploded structure of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the connection between the sealed connection assembly and the liquid cooling plate according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a three-dimensional structure from another angle in FIG. 1 .

Explanation of reference numbers:

1-liquid cold plate, 11-refrigerant channel, 12-refrigerant channel opening, 13-connection end, 14-positioning hole of liquid cold plate, 2-seal connection assembly, 21-main body, 22-liquid cold plate groove, 23 -connection hole, 24-positioning column of liquid cooling plate, 25-sealing groove, 26-waterway joint, 27-guiding positioning block, 28-guiding positioning groove, 3-water inlet pipe, 4-water outlet pipe, 5-connecting pipe, 6 - Plug;

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiment of the present utility model, then the directional indications are only used to explain the position in a certain posture (as shown in the accompanying drawing). As shown), the relative positional relationship, movement conditions, etc. between the various components, if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. Implying their relative importance or implying the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if the meaning of "and/or" appearing in the full text is to include three parallel schemes, taking "A and/or B" as an example, it includes scheme A, scheme B, or schemes satisfying both A and B . In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , also not within the scope of protection required by the utility model.

Normally, when the energy storage battery pack is charged and discharged, a large amount of heat will be generated. In addition, the battery space is tightly arranged, and the temperature in the energy storage battery pack rises rapidly. Under the action of the cooling device, it can be effectively reduced, but it is difficult to discharge the local heat in the box evenly, and there are large differences in the battery operating environment. The long-term operation of the battery pack in an environment with large temperature differences will lead to serious differences in the internal resistance and capacity of the batteries, which may cause some batteries to be overcharged or overdischarged, affect the performance and life of the energy storage system, and cause serious safety hazards .

In order to solve the above problems, the utility model provides a liquid-cooled battery pack structure without welding, and Fig. 1 to Fig. 3 are three-dimensional structural schematic diagrams of an embodiment of the utility model.

Please refer to Fig. 1, a liquid-cooled battery pack structure without welding, which is characterized in that it includes a plurality of liquid-cooled plates 1, and the lower part is provided with two connecting ends 13 extending outwards,

Multiple sets of sealed connection assemblies 2 are provided at the connection end 13, including two opposite main body parts 21,

The water inlet pipe 3 is sleeved on the sealing connection assembly 2 at the front end,

The outlet pipe 4 is sleeved on the sealing connection assembly 2 at the rear end,

The connecting pipe 5 connects the adjacent sealing connection components 2,

And a plug 6, which is arranged on the sealing connection assembly 2 at the end;

The liquid cold plate 1 is provided with a refrigerant channel 11, and the refrigerant channel 11 forms two refrigerant channel openings 12 communicating with the outside world on the connecting end 13; the sealing connection assembly 2 is arranged at the connecting end The part 13 includes two main body parts 21 which are arranged oppositely. The liquid cold plate groove 22 for accommodating the connecting end part 13 is arranged on the inner surface of the main body part 21, and the water channel joint 26 is arranged on the outer surface. The main body part 21 A sealing groove 25 is also provided on the part 21, and a plurality of connection holes 23 for fixedly connecting the two main parts are provided on the main part.

Further, sealing structure glue is set in the sealing groove 25. In this embodiment, glue is applied in the sealing groove 25. The glue is generally a sealing structure glue, which has the performance of waterproof and corrosion resistance; similarly, it can also be used in the sealing groove 25. The purpose of the sealing ring in the sealing groove 25 is to make the two main parts 21 of the sealing connection assembly fully fit; other ways can also be used to achieve this purpose, and there are no too many restrictions here.

Further, one end of the inner surface of the main body part 21 is provided with a guiding and positioning block 27 , and the other end is provided with a guiding and positioning slot 28 at a position corresponding thereto.

Further, the top of the guiding and positioning block 27 is provided with a fixing part extending horizontally to one side, and the guiding and positioning groove has a space for accommodating the fixing part. The fixing part is used to fix the two main body parts 21 during the grouping process, so as to avoid relative movement, which may cause liquid leakage.

Further, the waterway joint 26 and the connecting pipe 5 are two-way water-stop quick-plug joints, so they can be installed quickly during the grouping process, and the two-way water-stop joint can prevent the connecting pipe 5 and the waterway joint 26 from Liquid leakage during the plug-in connection process creates a safety hazard for the battery cell.

Further, a section of bellows is provided in the middle of the connecting pipe 5 (the bellows are not shown in the figure). The connecting pipe 5 is sleeved on the waterway joint 26 connected to the adjacent sealed connection components 2, so that each sealed connection component 2 is communicated; in order to adapt to, include the adjacent said liquid cold plate 1 and the batteries placed therein The position and size tolerance between each connecting pipe 5 is provided with a section of corrugated pipe; There are position and size tolerances between the electric cores placed therein, and the bellows can absorb vibrations to ensure the structural strength of the liquid cooling. The material of the connecting pipe 5 is not specifically limited. Considering that the application scenario is in a battery system, it needs to have the characteristics of corrosion resistance and insulation. Therefore, in this embodiment, the material of the connecting pipe 5 is selected from plastic, specifically PA66+GF30 The material is glass fiber reinforced plastic, so as to prevent the connecting pipe 5 from being corroded during long-term use.

Further, the connecting end 13 is provided with a liquid-cooled plate positioning hole 14 , and the main body 21 is provided with a liquid-cooled plate positioning post 24 matching with the liquid-cooled plate positioning hole 14 . During the installation process, the positioning hole 14 of the liquid cooling plate is sleeved on the positioning column 24 of the liquid cooling plate to limit the relative movement of the liquid cooling plate 1 and the sealing connection assembly 2 in the vertical direction. At the same time, the two main parts 21 are perpendicular to the The liquid cooling plate 1 is compressed in the direction of the plane, so that the liquid cooling plate 1 and the sealing connection assembly 2 are hermetically connected.

Further, the connecting holes 23 are provided with bolts, and after the main parts 21 and the liquid cooling plate 1 are installed, the bolts are passed through the connecting holes 23, and the other ends are locked with nuts.

Install the water inlet pipe 3 on the waterway joint 26 on the left side of the front end of the battery pack, install the water outlet pipe 4 on the waterway joint 26 on the right side of the rearmost end of the battery pack, and the waterway joints 26 at the other two ends through the plug 6 closed.

The refrigerant enters from the water inlet pipe 3 and flows into the sealed connection assembly 2 on the left side of the front end. A part of the refrigerant enters the liquid cold plate 1 and flows into the sealed connection assembly 2 on the other side. A part of the refrigerant flows into the next sealed connection assembly 2 through the connecting pipe 3 , into the next liquid cold plate 1, thus, the refrigerant passes through each liquid cold plate 1, passes through the refrigerant channel 11, takes away the heat generated by the charging and discharging of the battery cell, flows into the sealed connection assembly 2 on the other side, and passes through the connecting pipe 3 Enter the outlet pipe 6, flow out of the battery pack and circulate again.

The utility model also proposes a battery pack, the battery pack includes a battery case, the battery pack is liquid-cooled without welding group structure and a plurality of batteries are installed in the case, the battery pack is liquid-cooled without welding group structure Referring to the above embodiments for structure, since this battery pack adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be repeated here.

The utility model also proposes a container-type battery system, the container-type battery system includes the above-mentioned battery pack, the specific structure of the battery pack refers to the above-mentioned embodiment, because the container-type battery system adopts all the technical solutions of the above-mentioned embodiment , and therefore at least have the beneficial effects of the technical solutions of the above embodiments, which will not be repeated here.

The above is only an optional embodiment of the utility model, and therefore does not limit the patent scope of the utility model. Under the utility model concept of the utility model, the equivalent structural transformation made by using the specification of the utility model and the contents of the accompanying drawings , or directly/indirectly used in other relevant technical fields are all included in the patent protection scope of the present utility model. .

Claims (10)

1. The utility model provides a no welding unitized construction of group battery liquid cooling which characterized in that:

comprises a plurality of liquid cooling plates, the lower parts of which are provided with two connecting end parts extending outwards,

a plurality of groups of sealing connection components arranged at the connection end part and comprising two main body parts which are oppositely arranged,

a water inlet pipe sleeved on the sealing and connecting assembly at the end part,

the water outlet pipe is sleeved on the sealing connecting component at the end part,

a connecting pipe for connecting the adjacent sealing and connecting components,

the plug is arranged on the sealing connecting assembly at the end part;

a refrigerant channel is arranged in the liquid cooling plate, and two refrigerant channel openings communicated with the outside are formed on the connecting end part of the refrigerant channel; the sealing connection assembly is arranged at the connecting end part and comprises two main body parts which are arranged oppositely, a liquid cooling plate groove for containing the connecting end part is arranged on the inner surface of the main body part, a water channel joint is arranged on the outer surface of the main body part, a sealing groove is further arranged on the main body part, and a plurality of connecting holes for fixedly connecting the main body parts are further formed in the main body part.

2. The battery pack liquid-cooled weldless grouped structure according to claim 1, wherein a sealing ring or a sealing structure adhesive is arranged in the sealing groove.

3. The battery pack liquid-cooled weldless ganged structure as claimed in claim 1, wherein the main body has a guiding positioning block at one end and a guiding positioning groove at the other end.

4. The battery pack liquid-cooled weldless ganged structure as claimed in claim 3, wherein the top of the guiding and positioning block is provided with a fixing portion extending horizontally to one side or both sides, and the guiding and positioning groove has a space for accommodating the fixing portion.

5. The battery pack liquid-cooled weldless ganged structure as claimed in claim 1, wherein the water channel joint and the two ends of the connecting pipe are both two-way water-stopping quick-plugging joints.

6. The battery pack liquid-cooled weldless unitized structure of claim 1, wherein said connecting end portion is provided with a liquid-cooled plate positioning hole, and said main body portion is provided with a liquid-cooled plate positioning post engaged with said liquid-cooled plate positioning hole.

7. The battery pack liquid-cooled weldless ganged structure of claim 1, wherein a threaded connection is provided on the connection hole.

8. The battery pack liquid cooled weldless ganged structure as recited in claim 5, wherein a section of corrugated tube is disposed in the middle of the connecting tube.

9. A battery pack comprising a battery housing and a battery pack liquid cooled solderless unitized structure disposed within said battery housing, comprising the battery pack liquid cooled solderless unitized structure of any one of claims 1 to 8.

10. A containerized battery system comprising the battery pack of claim 9.

Images