Heat dissipation lithium battery module

Abstract

The utility model relates to the technical field of battery modules, in particular to a heat dissipation lithium battery module which comprises a shell, the shell comprises a base, side plates, a top plate and end plates at the two ends, a pipeline mounting groove is formed in the base, a main cooling pipeline attached to a battery cell is mounted in the pipeline mounting groove, and auxiliary cooling pipelines are mounted on the two sides of the main cooling pipeline; the auxiliary cooling pipeline comprises a conveying section and a plurality of cooling sections, an electric control valve for controlling on-off of liquid in the pipeline is arranged between the conveying section and the cooling sections, the cooling sections are wound on the periphery of a single battery cell, the battery cells are distributed in the length direction of the main cooling pipeline, and temperature sensors and controllers are mounted on the side surfaces of the battery cells. According to the battery module, the battery cells in the battery module can be accurately positioned and cooled, and the cooling effect of the battery module is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery modules, in particular to a heat dissipation lithium battery module. BACKGROUND

[0002] During the driving process of an electric vehicle, complex chemical reactions occur in the power battery during charging and discharging, which easily accumulates a large amount of heat in the battery, causing the battery operating temperature to rise, the battery performance to decrease (battery conversion efficiency and cycle life to decrease, etc.), and the battery to catch fire and explode, etc. Therefore, effectively solving the battery heat dissipation problem is very important for the safe driving of an electric vehicle.

[0003] The existing battery heat dissipation methods mainly adopt two methods of series water cooling heat dissipation and parallel water cooling heat dissipation. In the series water cooling heat dissipation, since each battery module is water cooled in series, the problem of uneven distribution of flow does not occur, and the system flow control is simple. However, since the series cooling water path is long, the cooling water temperature gradually increases when flowing through the front and rear end battery modules, which easily causes the temperature difference between the front and rear end battery modules to be large, and the rear end battery module to overheat, thereby affecting the battery performance and life. In the parallel water cooling heat dissipation, each battery module is water cooled in parallel, and the temperature difference between each battery module is small. However, due to the influence of factors such as water channel structure, processing technology, and pipeline arrangement, the problem of uneven distribution of flow of each battery module easily occurs, thereby easily causing uneven heat dissipation between battery monomers.

[0004] Chinese patent CN105406147A discloses a battery water cooling plate water path structure and a battery water cooling heat dissipation method. The battery water cooling plate water path structure includes a main cooling pipe for series heat dissipation of front end battery modules and rear end battery modules, and an auxiliary cooling pipe for heat dissipation of the rear end battery modules. An electric control valve is arranged on the auxiliary cooling pipe to control the opening and closing of the auxiliary cooling pipe according to the temperature of the rear end battery module. The battery water cooling heat dissipation method includes the following steps: step 1) inputting cooling liquid to perform series heat dissipation of the front end battery modules and the rear end battery modules; and step 2) detecting the temperature of the rear end battery module, increasing the cooling liquid flow of the rear end battery module when the detected temperature is higher than a set temperature, and reducing the cooling liquid flow of the rear end battery module when the detected temperature is lower than the set temperature. The present application has the advantages of simple structure, uniform system flow distribution, and temperature control of the rear end battery module.

[0005] In the prior art, the main cooling pipe is matched with the auxiliary cooling pipe for heat dissipation of the rear end battery module, which can effectively solve the problem of high temperature of the rear end battery module. However, when a single cell in the battery module fails and the temperature rises, the auxiliary cooling pipe cannot accurately position and cool. Practical new type content

[0006] In order to overcome the problems in the prior art, the present application provides a heat dissipation lithium battery module.

[0007] The application provides a heat dissipation lithium battery module adopting the following technical scheme:

[0008] The heat dissipation lithium battery module comprises a shell, the shell comprises a base, a side plate, a top plate and end plates at two ends, a pipeline installation groove is formed in the base, a main cooling pipeline is installed in the pipeline installation groove and adheres to a battery cell, auxiliary cooling pipelines are installed on both sides of the main cooling pipeline, the auxiliary cooling pipelines comprise conveying sections and a plurality of cooling sections, and an electric control valve for controlling the liquid on-off of the pipeline is arranged between the conveying section and the cooling section, the cooling section is wound around the periphery of a single battery cell, the battery cells are distributed along the length direction of the main cooling pipeline, and temperature sensors and a controller are installed on the side surface of the battery cell.

[0009] Preferably, the electric control valve and the temperature sensor are both in signal connection with the controller, and the controller controls the opening and closing of the electric control valve through the received temperature sensor signal.

[0010] Through the above technical scheme, the pipeline installation groove formed in the base of the shell is used for installing the main cooling pipeline and the conveying sections of the auxiliary cooling pipelines on both sides of the main cooling pipeline, the battery cells are distributed along the length direction of the main cooling pipeline, and the serpentine main cooling pipeline can relatively uniformly dissipate heat for the battery cells. The installed auxiliary cooling pipelines guide the liquid through the conveying sections, when the temperature sensor on the battery cell monitors that the temperature of the battery cell abnormally rises to the set value of the controller, the controller can open the electric control valves at both ends of the cooling section of the battery cell, the cooling liquid in the conveying section is guided into the cooling section, and the cooling section wound around the battery cell can quickly dissipate heat for the battery cell.

[0011] Preferably, the main cooling pipeline is distributed in a serpentine shape along the length direction, and the water inlet and the water outlet of the main cooling pipeline are both arranged at one end of the battery module.

[0012] Preferably, the main cooling pipeline is provided with two groups of pipelines, the water inlet of the main cooling pipeline is arranged at the center section of the battery module, the water outlet is arranged at both sides of the battery module, and the water inlets and the water outlets of the two groups of pipelines are respectively gathered into one port.

[0013] By adopting the technical scheme, the main cooling pipeline is distributed in a serpentine shape along the length direction, the main cooling pipeline can repeatedly perform heat transfer at the bottom of the plurality of battery cells, and the situation that the battery cells close to the water inlet are good at heat dissipation and the battery cells close to the water outlet are poor at heat dissipation in the traditional battery module is avoided. Moreover, the main cooling pipeline adopts two groups of pipelines, the water inlets and the water outlets of the two groups of pipelines are converged into one port, the water inlet and the water outlet can be synchronously supplied and drained, the operation is facilitated, and the water inlets of the two groups of pipelines are arranged at the center section of the battery module, according to the situation that the heat of the battery cells generally rises from the center to the periphery, the water inlets arranged at the center section of the battery module can timely absorb and process the heat of the center of the battery cells, and the heat dissipation effect of the battery module is improved.

[0014] Preferably, the conveying section in the auxiliary cooling pipeline is connected in parallel with the main cooling pipeline, the conveying section is annularly distributed around the main cooling pipeline, and the two ends of the conveying section are open and respectively communicated with the water inlet and the water outlet.

[0015] Preferably, the cooling section in the auxiliary cooling pipeline adopts a spiral structure, the inlet and the outlet of the cooling section are respectively arranged on the two side pipelines of the auxiliary cooling pipeline, and the connection positions of the inlet and the outlet are respectively provided with an electric control valve.

[0016] By adopting the technical scheme, the conveying section in the auxiliary cooling pipeline is connected in parallel with the main cooling pipeline, the water inlet and the water outlet of the main cooling pipeline are synchronously supplied and drained, and the cooling section in the auxiliary cooling pipeline adopts a spiral structure and is wound on the battery cells, when it is needed to quickly cool the single battery cell or the plurality of battery cells, the electric control valve on the corresponding cooling section is opened, the cooling water is guided into the cooling section, and the cooling liquid is fully exchanged with the battery cells through the cooling section in the spiral structure, so that the battery cells are effectively and quickly cooled.

[0017] Preferably, the bottom surface of the battery cell and the shell and the adjacent battery cells are connected by the heat-conducting glue, and the main cooling pipeline on the base is spaced apart from the cooling section on the battery cell and is connected by the heat-conducting glue.

[0018] Preferably, the two sides of the battery cell in the shell are fixedly connected by the hoop, the hoop is attached to the side surface of the battery cell and is fixedly connected to the end plate at the two ends, and the number of the hoop is not less than two.

[0019] By adopting the technical scheme, the bottom surface of the battery cell and the shell and the adjacent battery cells are connected by the heat-conducting glue, and the main cooling pipeline on the base is spaced apart from the cooling section on the battery cell and is connected by the heat-conducting glue.

[0020] In summary, the present application has at least one of the following beneficial technical effects:

[0021] 1.The application can effectively solve the problem of high temperature of the rear-end battery module by adopting the main cooling pipeline with a serpentine structure distributed along the length direction of the arrangement of the battery cells in the battery module, and setting the water inlets of the two groups of pipelines in the center section of the battery module, which can promptly dissipate the heat of the center of the battery cells and effectively improve the heat dissipation effect of the battery module.

[0022] 2.In the application, the auxiliary cooling pipeline guides the liquid through the conveying section, when the temperature sensor on the battery cell detects that the temperature of the battery cell abnormally rises, the electric control valve at both ends of the cooling section is opened, the cooling liquid in the conveying section is guided into the cooling section, and the cooling section wound on the battery cell precisely and quickly dissipates the heat of the faulty battery cell. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an exploded view of the overall structure of the heat dissipation lithium battery module.

[0024] Figure 2 It is an enlarged view of A in Figure 1

[0025] Figure 3 It is an exploded view of the overall structure of the heat dissipation lithium battery module.

[0026] Figure 4 It is an enlarged view of B in Figure 3

[0027] REFERENCE SIGNS: 1, shell; 11, base; 111, pipeline mounting groove; 12, side plate; 13, top plate; 14, end plate; 15, hoop; 2, main cooling pipeline; 21, water inlet; 22, water outlet; 3, auxiliary cooling pipeline; 31, conveying section; 32, cooling section; 33, electric control valve; 4, battery cell; 41, temperature sensor; 42, controller. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings Figures 1-4 Further detailed description of the application.

[0029] The embodiment of the application discloses a heat dissipation lithium battery module.

[0030] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ​​The application discloses a heat-dissipation lithium battery module, which comprises a shell 1, wherein the shell 1 comprises a base 11, side plates 12, a top plate 13 and end plates 14 at two ends, the base 11 is provided with a pipeline mounting groove 111, a main cooling pipeline 2 is mounted on the pipeline mounting groove 111 and is in contact with a battery cell 4, auxiliary cooling pipelines 3 are mounted on both sides of the main cooling pipeline 2, the auxiliary cooling pipelines 3 comprise a conveying section 31 and a plurality of cooling sections 32, an electric control valve 33 for controlling the liquid on-off of the pipeline is arranged between the conveying section 31 and the cooling section 32, the cooling section 32 is wound around the periphery of the single battery cell 4, the battery cells 4 are distributed along the length direction of the main cooling pipeline 2, and temperature sensors 41 and a controller 42 are mounted on the side of the battery cells 4. The electric control valve 33 and the temperature sensor 41 are signal-connected with the controller 42, and the controller 42 controls the opening and closing of the electric control valve 33 by receiving the signal of the temperature sensor 41. The pipeline mounting groove 111 provided on the base 11 of the shell 1 is used for mounting the main cooling pipeline 2 and the conveying sections 31 of the auxiliary cooling pipelines on both sides of the main cooling pipeline 2, the battery cells 4 are distributed along the length direction of the main cooling pipeline 2, and the serpentine main cooling pipeline 2 can relatively uniformly dissipate heat for the battery cells 4. The installed auxiliary cooling pipelines 3 guide the liquid through the conveying sections 31, when the temperature sensor 41 on the battery cell 4 monitors that the temperature of the battery cell 4 abnormally rises to a set value of the controller 42, the controller 42 can open the electric control valves 33 at both ends of the cooling section 32 of the battery cell 4, the cooling liquid in the conveying section 31 is guided into the cooling section 32, and the battery cell 4 is rapidly cooled through the cooling section 32 wound on the battery cell 4.

[0031] With reference to Figure 1 , Figure 2 and Figure 3 , the main cooling pipeline 2 is distributed in a serpentine shape along the length direction, and the water inlet 21 and the water outlet 22 of the main cooling pipeline 2 are arranged at one end of the battery module. The main cooling pipeline 2 is provided with two groups of pipelines, the water inlet 21 of the main cooling pipeline 2 is arranged at the center section of the battery module, the water outlet 22 is arranged at both sides of the battery module, and the water inlets 21 and the water outlets 22 of the two groups of pipelines are gathered into one port respectively. The main cooling pipeline 2 is distributed in a serpentine shape along the length direction, the main cooling pipeline 2 can repeatedly transfer heat at the bottom of the plurality of battery cells 4, and the situation that the battery cells 4 near the water inlet 21 are good at heat dissipation and the battery cells 4 near the water outlet 22 are poor at heat dissipation in the traditional battery module is avoided. Moreover, the main cooling pipeline 2 adopts two groups of pipelines, the water inlets 21 and the water outlets 22 of the two groups of pipelines are gathered into one port, water can be in and out synchronously, operation is facilitated, and the water inlets 21 of the two groups of pipelines are arranged at the center section of the battery module, according to the situation that the heat of the battery cells 4 generally spreads from the center to the periphery, the heat of the center of the battery cells 4 can be timely absorbed and treated by arranging the water inlets 21 at the center section of the battery module, and the heat dissipation effect of the battery module is improved.

[0032] With reference toFigure 1 、 Figure 2 and Figure 3 The delivery section 31 in the auxiliary cooling pipeline 3 is connected in parallel with the main cooling pipeline 2, and the delivery section 31 is annularly distributed around the main cooling pipeline 2, and the two ends are respectively communicated with the water inlet 21 and the water outlet 22. The cooling section 32 in the auxiliary cooling pipeline 3 adopts a spiral structure, wherein the inlet and outlet of the cooling section 32 are respectively arranged on the two sides of the auxiliary cooling pipeline 3, and the connection positions of the two are respectively provided with electric valves 33. The delivery section 31 in the auxiliary cooling pipeline 3 is connected in parallel with the main cooling pipeline 2, and the water inlet and the water outlet are synchronized with the main cooling pipeline 2, and the cooling section 32 in the auxiliary cooling pipeline is wound on the battery cell 4 in a spiral structure. When it is needed to quickly cool a single battery cell 4 or multiple battery cells 4, the electric valve 33 on the cooling section 32 corresponding to the battery cell 4 is opened, the cooling liquid is guided into the cooling section 32, and the cooling liquid is fully exchanged with the battery cell 4 through the cooling section 32 wound on the battery cell 4, so that the battery cell 4 is effectively and quickly cooled.

[0033] Referring to Figure 1 、 Figure 2 and Figure 3 Figure 1 Figure 2 Figure 3 The bottom surface of the battery cell 4 and the shell 1, and the adjacent battery cells 4 are connected by the heat-conducting glue, wherein the main cooling pipeline 2 on the base 11 is spaced apart from the cooling section 32 on the battery cell 4 and connected by the heat-conducting glue. The two sides of the battery cell 4 in the shell 1 are fixedly connected by the hoop 15, wherein the hoop 15 is attached to the side surface of the battery cell 4 and fixedly connected to the end plate 14 at both ends, and the number of the hoop 15 is not less than two. The bottom surface of the battery cell 4 and the shell 1, and the adjacent battery cells 4 are connected and fixed by the heat-conducting glue, and the battery cell 4 is further fixed by the hoop 15 on the two sides and the end plate 14 at both ends, so as to ensure the stability of the overall structure of the battery module. The heat-conducting glue can well conduct heat, so that the battery cell 4 in the battery module can be effectively cooled by the main cooling pipeline 2 and the auxiliary cooling pipeline.

[0034] Working principle: when the battery module works, the circulating cooling water source is connected through the water inlet 21 and the water outlet 22. The cooling water guided into the water inlet 21 enters the main cooling pipeline and the delivery section 31 in the auxiliary cooling pipeline 3, wherein the main cooling pipeline is designed by two groups of serpentine structures, and the heat is dissipated from the center of the battery cell 4 to both sides. When the temperature sensor 41 on the single battery cell 4 detects that the temperature of the battery cell 4 abnormally rises to the value set by the controller 42, the controller 42 can open the electric valves 33 at both ends of the cooling section 32 on the battery cell 4, so as to guide the cooling liquid in the delivery section 31 into the cooling section 32, and the cooling section 32 wound on the battery cell 4 can quickly cool the battery cell 4.

[0035] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A heat dissipating lithium battery module, characterized by: The shell (1) comprises a base (11), side plates (12), a top plate (13) and end plates (14) at both ends, wherein the base (11) is provided with a pipeline mounting groove (111), a main cooling pipeline (2) is mounted on the pipeline mounting groove (111) and is attached to the battery cell (4), auxiliary cooling pipelines (3) are mounted on both sides of the main cooling pipeline (2), the auxiliary cooling pipelines (3) comprise a conveying section (31) and a plurality of cooling sections (32), and an electric control valve (33) for controlling the opening and closing of the pipeline liquid is arranged between the conveying section (31) and the cooling section (32), wherein the cooling section (32) is wound around the periphery of a single battery cell (4), the battery cell (4) is distributed along the length direction of the main cooling pipeline (2), and a temperature sensor (41) and a controller (42) are mounted on the side surface of the battery cell (4). The electric control valve (33) and the temperature sensor (41) are both in signal connection with the controller (42), and the controller (42) controls the opening and closing of the electric control valve (33) through the received temperature sensor (41) signal.

2. The heat-dissipating lithium battery module according to claim 1, wherein: The main cooling pipeline (2) is distributed in a serpentine shape along its length direction, and the water inlet (21) and the water outlet (22) of the main cooling pipeline (2) are both arranged at one end of the battery module.

3. The heat-dissipating lithium battery module of claim 1, wherein: The main cooling pipeline (2) is provided with two groups of pipelines, the water inlet (21) of the main cooling pipeline (2) is arranged at the center section of the battery module, the water outlet (22) is arranged at both sides of the battery module, and the water inlets (21) and the water outlets (22) of the two groups of pipelines are respectively gathered into one port.

4. The heat-dissipating lithium battery module of claim 3, wherein: The conveying section (31) of the auxiliary cooling pipeline (3) is connected in parallel with the main cooling pipeline (2), the conveying section (31) is distributed in a ring shape around the main cooling pipeline (2), and the two ends are respectively communicated with the water inlet (21) and the water outlet (22).

5. The heat-dissipating lithium battery module of claim 1, wherein: The cooling section (32) of the auxiliary cooling pipeline (3) adopts a spiral structure, the inlet and the outlet of the cooling section (32) are arranged on the pipelines on both sides of the auxiliary cooling pipeline (3), and the connection positions of the two are both provided with the electric control valve (33).

6. The heat-dissipating lithium battery module of claim 5, wherein: The bottom surface of the battery cell (4) and the shell (1) are connected through the heat-conducting glue, and the adjacent battery cells (4) are also connected through the heat-conducting glue, wherein the main cooling pipeline (2) on the base (11) is distributed at intervals with the cooling section (32) on the battery cell (4) and is connected through the heat-conducting glue.

7. The heat-dissipating lithium battery module of claim 1, wherein: The two sides of the battery cell (4) in the shell (1) are fixedly connected through the hoop ring (15), wherein the hoop ring (15) is attached to the side surface of the battery cell (4) and is fixedly connected at both ends to the end plate (14), and the number of the hoop rings (15) is not less than two.

8. The heat-dissipating lithium battery module of claim 7, wherein: ​

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