Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The battery module comprises a bracket assembly, a plurality of single batteries, a heat conduction block and a heat dissipation pipe, the plurality of single batteries are arranged on the bracket assembly; the heat-conducting block is in contact with the side surfaces of the plurality of single batteries; the heat dissipation pipe makes contact with the heat conduction block, a containing cavity in a vacuum state is formed in the heat dissipation pipe, and the containing cavity is used for containing cooling liquid. The support assembly limits and fixes a plurality of single batteries, the single batteries can generate heat during working, the heat conduction blocks make contact with the side faces of the single batteries, and the heat dissipation pipes make contact with the heat conduction blocks, so that the heat of the batteries is rapidly transferred to the heat dissipation pipes from the side faces of the single batteries, heat accumulated on the single batteries is reduced, and the heat dissipation efficiency is improved. Therefore, after auxiliary devices such as a fan blow air near the radiating pipe, a large amount of heat can be quickly taken away to achieve the cooling effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery module and a battery pack. BACKGROUND

[0002] In the process of charging and discharging, the battery will release a certain amount of heat with the chemical reaction, and the battery pack is composed of a large number of batteries. In the production of battery pack, the characteristics of the battery are used for heat dissipation, such as the large gap between the cylindrical batteries and the large surface area of the square batteries. However, relying on its own heat dissipation is not enough, and other solutions are needed to assist. For example, a heat dissipation fan is arranged at one end of the battery pack, and a ventilation hole is left at the other end to accelerate air flow and carry away the heat on the surface of the battery.

[0003] However, these heat dissipation methods cannot quickly transfer the heat generated by the battery, resulting in heat accumulation, so that the battery continues to work at high temperature. SUMMARY

[0004] One object of the present application is to provide a battery module and a battery pack, which aims to solve the technical problem of battery heat dissipation.

[0005] To achieve the above-mentioned purpose, one scheme provided by the present application is: a battery module, the battery module comprising a support assembly, a plurality of single batteries, a heat-conducting block and a heat dissipation pipe; the plurality of single batteries are arranged on the support assembly; the heat-conducting block is in contact with the side surface of the plurality of single batteries; the heat dissipation pipe is in contact with the heat-conducting block, and the heat dissipation pipe forms a containing cavity in a vacuum state, and the containing cavity is used for containing cooling liquid.

[0006] Optionally, the side of the heat-conducting block away from the single battery is provided with a through groove extending along a first direction, and the heat dissipation pipe is arranged in the through groove.

[0007] Optionally, the plurality of single batteries are arranged in multiple columns along a second direction, the first direction and the second direction are perpendicular to each other, and a heat dissipation channel parallel to the first direction is formed between each adjacent column of single batteries.

[0008] Optionally, the heat dissipation pipe is annular.

[0009] Optionally, the heat dissipation pipe has a heat absorption plane, and the heat absorption plane is attached to the heat-conducting block.

[0010] Optionally, the heat-conducting block comprises a main part and a secondary part connected to each other, the main part is provided with a plurality of spaced limiting grooves, the single battery is assembled in the limiting groove, the main part is inserted between the adjacent single batteries to surround part of the side wall of the single battery, and the secondary part is connected with the heat dissipation pipe away from the main part.

[0011] Optionally, the single battery is a cylindrical battery, and the groove wall of the limiting groove is arc-shaped.

[0012] Optionally, the ratio of the depth of the main part into the single cell to the width of the single cell is α, where 0.5 ≤ α ≤ 1.

[0013] Optionally, the bracket assembly includes an upper bracket and a lower bracket. The upper bracket has multiple upper limit ports that penetrate through the upper bracket. The lower bracket has multiple lower limit ports that penetrate through the lower bracket. One end of a single battery cell is fitted into the upper limit port, and the other end of the single battery cell is fitted into the lower limit port.

[0014] Optionally, the upper support is provided with an upper connecting column facing the lower support, and the lower support is provided with a lower connecting column facing the upper support, with the upper connecting column and the lower connecting column connected together.

[0015] To achieve the above objectives, the present invention provides a solution: a battery pack comprising: a fan and a plurality of battery modules as described above, wherein the fan is used to blow air toward the heat sink.

[0016] The beneficial effects of this invention are as follows:

[0017] The bracket assembly of this invention limits and fixes multiple individual batteries. The individual batteries generate heat during operation. The heat-conducting block contacts the sides of the multiple individual batteries, and the heat dissipation pipe contacts the heat-conducting block. This allows the heat from the side of the individual battery to be quickly transferred to the heat dissipation pipe, reducing the accumulation of heat on the individual battery. In this way, auxiliary devices such as fans can quickly remove a large amount of heat after blowing air near the heat dissipation pipe, achieving a cooling effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the assembly structure of the battery module provided in an embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of the battery module provided in an embodiment of the present invention;

[0021] Figure 3 This is provided by the embodiments of the present invention. Figure 1 Schematic diagram of the cross-sectional structure along the middle III-III direction;

[0022] Figure 4 This is provided by the embodiments of the present invention. Figure 1 A schematic diagram of the cross-sectional structure along the IV-IV direction.

[0023] Fig. 10 is a schematic view of the bracket assembly 10, the upper bracket 12, the upper limiting opening 121, and the upper connecting column 122.

[0024] Fig. 11 is a schematic view of the lower bracket 14, the lower limiting opening 141, the lower connecting column 142, the single battery 20, and the heat-conducting block 30.

[0025] Fig. 12 is a schematic view of the limiting groove 31, the through groove 32, the main part 33, the auxiliary part 34, the heat-dissipating pipe 40, and the heat-absorbing plane 41. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 is a schematic view of an assembly structure of a battery module provided by an embodiment of the present application, Figure 2 is a schematic view of an exploded structure of a battery module provided by an embodiment of the present application, Figure 3 is a schematic view of a cross-sectional structure in the III-III direction of Figure 1 provided by an embodiment of the present application.

[0028] The present application provides a battery module, which comprises a bracket assembly 10, a plurality of single batteries 20, a heat-conducting block 30, and a heat-dissipating pipe 40. The plurality of single batteries 20 are arranged on the bracket assembly 10. The single battery 20 can be a cylindrical battery, a square battery, or the like. The single battery 20 can be a sodium-ion battery, a lithium-ion battery, or the like. The bracket assembly 10 limits and fixes the plurality of single batteries 20 to form a stable whole. The heat-conducting block 30 is in contact with the side surface of the plurality of single batteries 20. The end surface of the single battery 20 is the position of the pole column. The side surface of the single battery 20 is the surface in the transverse direction. The heat generated by the single battery 20 is quickly absorbed by the heat-conducting block 30 through the side surface. The material of the heat-conducting block 30 can be aluminum, copper, or the like. The heat-dissipating pipe 40 is in contact with the heat-conducting block 30. The heat-dissipating pipe 40 can quickly absorb the heat on the heat-conducting block 30.

[0029] The heat dissipation pipe 40 is internally formed with a containing cavity in a vacuum state, which is used for containing cooling liquid. The cooling liquid in the containing cavity in the vacuum state can reduce its boiling point, so as to more favorably absorb heat by changing from liquid state to gaseous state, and dissipate heat by changing from gaseous state to liquid state. The cooling liquid on the side of the heat dissipation pipe 40 away from the heat conduction block 30 changes from liquid state to gaseous state after absorbing heat, and moves to the side of the heat dissipation pipe 40 close to the heat conduction block 30, so as to take away the heat on the heat conduction block 30. The cooling liquid on the side of the heat dissipation pipe 40 close to the heat conduction block 30 changes from gaseous state to liquid state after dissipating heat, and moves to the side of the heat dissipation pipe 40 away from the heat conduction block 30, so as to continue to absorb heat from the heat conduction block 30.

[0030] In the embodiment, the support assembly 10 limits and fixes a plurality of single batteries 20. The single batteries 20 generate heat in operation. The heat conduction block 30 is in contact with the side of the plurality of single batteries 20, so as to quickly absorb the heat on the single batteries 20, and reduce the heat accumulation on the single batteries 20. In addition, the support assembly 10 can also limit and fix the plurality of single batteries 20. The heat dissipation pipe 40 is in contact with the heat conduction block 30, so as to further quickly absorb the heat on the heat conduction block 30 and dissipate the heat to the air or a preset position. In this way, the fan and other auxiliary devices can quickly take away a large amount of heat to achieve the effect of cooling the single batteries 20 after blowing the air near the heat dissipation pipe 40.

[0031] In an embodiment, the heat conduction block 30 is provided with a through groove 32 extending along the first direction on the side away from the single battery 20. The heat dissipation pipe 40 is arranged in the through groove 32. The opposite ends of the through groove 32 are in an open state. The through groove 32 is internally formed with a directional channel along the first direction. In the heat dissipation process, the air can flow directionally in the through groove 32 without obstruction. The air takes away the heat on the heat conduction block 30 and the heat on the heat dissipation pipe 40 in the flowing process, so as to play a role in cooling.

[0032] In addition, the heat dissipation pipe 40 is assembled in the through groove 32. The opposite two side walls of the through groove 32 play a role in limiting the heat dissipation pipe 40, so as to improve the stability of the heat dissipation pipe 40.

[0033] In an embodiment, the heat dissipation pipe 40 is annular. The heat dissipation pipe 40 is internally formed with a containing cavity in a vacuum state, which is used for containing cooling liquid. The cooling liquid in the containing cavity in the vacuum state can reduce its boiling point, so as to more favorably absorb heat by changing from liquid state to gaseous state, and dissipate heat by changing from gaseous state to liquid state. The annular shape of the heat dissipation pipe 40 can improve the flowing path of the cooling liquid, so as to improve the heat dissipation efficiency.

[0034] In an embodiment, the heat dissipation pipe 40 has a heat absorption plane 41 which is attached to the heat conduction block. The heat absorption plane 41 is flat, and the heat absorption plane 41 directly contacts the heat conduction block to increase the contact area and enhance heat conduction. Optionally, heat absorption paste is arranged between the heat absorption plane 41 and the heat conduction block, and the heat absorption paste fills the gap between the heat absorption plane 41 and the heat conduction block, thereby further improving the heat transfer efficiency.

[0035] In an embodiment, the plurality of single batteries 20 are arranged in multiple columns along a second direction, the first direction and the second direction are perpendicular to each other, the first direction is the transverse direction, and the second direction is the longitudinal direction, that is, the battery module has a plurality of single batteries 20 arranged in multiple columns, and each adjacent column of single batteries 20 forms a heat dissipation channel parallel to the first direction, and the heat dissipation channel penetrates through the opposite ends of the battery module. During the heat dissipation process, the air can flow directionally without obstruction, and the air carries away the heat on the single battery 20 during the flow, thereby playing a role in cooling. The heat dissipation channel can be long strip-shaped, S-shaped, trapezoidal, etc.

[0036] In an embodiment, the heat conduction block 30 includes a main part and a secondary part connected to each other. The main part is provided with a plurality of spaced limiting grooves 31, and the single battery 20 is assembled in the limiting groove 31, and the main part is inserted between the adjacent single batteries 20 to surround part of the side wall of the single battery 20, and the secondary part is connected to the heat dissipation pipe 40 away from the main part. The cross-sectional curvature of the limiting groove 31 is similar to the cross-sectional curvature of the single battery 20, the groove wall of the limiting groove 31 is attached to the side wall of the single battery 20, and the limiting groove 31 and the single battery 20 are completely matched, thereby ensuring sufficient contact area for heat conduction. For example, if the single battery 20 is circular, the limiting groove 31 is arc-shaped; if the single battery 20 is rectangular, the limiting groove 31 is U-shaped. After the single battery 20 is assembled in the limiting groove 31, the heat of the single battery 20 is first transferred to the groove wall of the limiting groove 31, and then transferred along the heat conduction block 30 to the side of the heat conduction block 30 away from the limiting groove 31, thereby conducting the heat on the single battery 20 to the heat conduction block 30, so that the heat is continuously transferred out by the heat conduction block 30. Of course, heat conduction paste can be coated between the limiting groove 31 and the single battery 20 to further improve the heat transfer efficiency.

[0037] In an embodiment, the ratio of the depth of the main part into the single battery 20 to the width of the single battery 20 is α, 0.5≤α≤1, and α can be 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, etc. That is, the limiting groove 31 can wrap at least half of the depth of the side wall of the single battery 20, or even completely wrap the single battery 20, for example, the heat conduction block 30 half-wraps the single battery 20, or can completely wrap the single battery 20.

[0038] In addition, it is understandable that the limiting groove 31 increases the contact area between the heat-conducting block 30 and the single cell 20, while also limiting the single cell 20. The single cell 20 is constrained in its radial direction, thereby further improving the stability of the single cell 20.

[0039] In one embodiment, multiple individual battery cells 20 are arranged at intervals along a first direction, and a portion of the heat-conducting block 30 is filled between adjacent individual battery cells 20. The first direction is the length direction of the heat-conducting block 30. Gaps are formed between the individual battery cells 20, and the heat-conducting block 30 fills these gaps, thereby further increasing the contact area between the heat-conducting block 30 and the individual battery cells 20. Furthermore, the spaces in the gaps not filled with the heat-conducting block 30 allow for normal airflow, thereby accelerating heat dissipation.

[0040] Secondly, because there are gaps between individual cells 20, there is sufficient buffer space between individual cells 20. When an individual cell 20 malfunctions and bulges, it will not squeeze adjacent normal individual cells 20 and damage them, thus ensuring that no chain reaction occurs and ensuring that the abnormal situation of the individual cells 20 only occurs within a local and controllable range.

[0041] Please see Figures 1 to 4 As shown, Figure 4 This is provided by the embodiments of the present invention. Figure 1 A schematic diagram of the cross-sectional structure along the IV-IV direction.

[0042] In one embodiment, the support assembly 10 includes an upper support 12 and a lower support 14. The upper support 12 has multiple upper limit ports 121 that penetrate through the upper support 12. The lower support 14 has multiple lower limit ports 141 that penetrate through the lower support 14. One end of the individual battery 20 is fitted into the upper limit port 121, and the other end of the individual battery 20 is fitted into the lower limit port 141. The upper support 12 and the lower support 14 limit and fix the individual battery 20 from its opposite ends. The space between the upper support 12 and the lower support 14 is left open for airflow to improve airflow efficiency. In addition, the upper limit ports 121 and the lower limit ports 141 are both open, so regardless of whether the individual battery 20 is installed upright or reversed, the gas in the individual battery 20 can be smoothly discharged through the upper limit port 121 or the lower limit port 141 in case of an abnormal state.

[0043] Further, the upper support 12 is provided with an upper connecting column 122 towards the lower support 14, and the lower support 14 is provided with a lower connecting column 142 towards the upper support 12, the upper connecting column 122 and the lower connecting column 142 are connected together, so as to connect the upper support 12 and the lower support 14 into an integral whole. The upper connecting column 122 and the lower connecting column 142 can be connected together by screws, and can be connected together by adhesion. The upper connecting column 122 and the lower connecting column 142 do not excessively occupy the space between the upper support 12 and the lower support 14 under the premise of connecting the upper support 12 and the lower support 14 into an integral whole, so as to ensure the normal circulation of air.

[0044] The application also protects a battery pack, the battery pack comprising a fan and a plurality of battery modules of any one of the above embodiments, the fan being used for blowing air towards the heat dissipation pipe 40.

[0045] It should be noted that all directional indications, such as upper, lower, left, right, front, back, etc., are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0046] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can be indirectly connected to the other element through a middle element.

[0047] In addition, the descriptions involving "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of a person skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0048] The above is only the preferred embodiments of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made according to the contents of the present application specification and drawings, or direct / indirect application in other related technical fields within the concept of the present application are included in the patent protection scope of the present application.

Claims

1. A battery module, characterized by, The battery pack comprises: a bracket assembly; a plurality of single batteries arranged on the bracket assembly; a heat-conducting block in contact with the plurality of single batteries; a heat-dissipating pipe in contact with the heat-conducting block, the heat-dissipating pipe being formed with a containing cavity in a vacuum state for containing cooling liquid. The heat-conducting block is provided with a through groove extending in a first direction on a side away from the single batteries, and the heat-dissipating pipe is arranged in the through groove.

2. The battery module of claim 1, wherein, The plurality of single batteries are arranged in multiple columns in a second direction, and the first direction and the second direction are perpendicular to each other, and a heat-dissipating channel parallel to the first direction is formed between each adjacent column of single batteries.

3. The battery module of claim 2, wherein, The heat-dissipating pipe is annular.

4. The battery module of claim 1, wherein, The heat-dissipating pipe has a heat-absorbing plane attached to the heat-conducting block.

5. The battery module of claim 1, wherein, The heat-conducting block comprises a main part and a secondary part connected to each other, the main part is provided with a plurality of spaced limiting grooves, the single batteries are assembled in the limiting grooves, the main part is inserted between adjacent single batteries to surround part of the side walls of the single batteries, and the secondary part is connected to the heat-dissipating pipe on a side away from the main part.

6. The battery module according to any one of claims 1 to 5, characterized in that The single battery is a cylindrical battery, and the groove wall of the limiting groove is arc-shaped.

7. The battery module of claim 6, wherein, The ratio of the depth of the main part into the single battery to the width of the single battery is α, and 0.5≤α≤1.

8. The battery module of claim 6, wherein, The bracket assembly comprises an upper bracket and a lower bracket, the upper bracket is provided with a plurality of upper limiting openings penetrating the upper bracket, the lower bracket is provided with a plurality of lower limiting openings penetrating the lower bracket, one end of the single battery is assembled in the upper limiting opening, and the other end of the single battery is assembled in the lower limiting opening.

9. The battery module of any one of claims 1 to 5, wherein, The upper bracket is provided with an upper connecting column facing the lower bracket, the lower bracket is provided with a lower connecting column facing the upper bracket, and the upper connecting column and the lower connecting column are connected together.

10. The battery module of claim 9, wherein, The battery pack comprises a fan and a plurality of battery modules as claimed in any one of claims 1 to 10, and the fan is used to blow air towards the heat-dissipating pipe.

11. A battery pack, characterized by ​

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