Integrated cooling device for cylindrical battery cell module

Abstract

The utility model discloses an integrated cooling device for a cylindrical battery cell module, which comprises an upper cover plate, a lower tray and an outer frame, a cooling coil and a plurality of rows of cylindrical battery cells are arranged in the outer frame, the battery cells are arranged between an upper battery cell pressing plate and a lower battery cell pressing plate, at least one side of each row of cylindrical battery cells is in contact with the cooling coil, and the cooling coil is in contact with the lower tray. The inlet and outlet ends of the cooling coils extend to the outer side of the outer frame from side holes of the outer frame, positive and negative electrodes of adjacent battery cells are connected in series through welded copper bars, a copper bar upper pressing plate is arranged at the top of the upper copper bar, a copper bar lower pressing plate is arranged at the bottom of the lower copper bar, the upper cover plate is arranged at the top of the copper bar upper pressing plate, and the lower tray is arranged at the bottom of the copper bar lower pressing plate. And the upper cover plate and the lower tray are detachably connected with the outer frame. The cooling device disclosed by the utility model is simple in structure, and can be used for cooling the battery cell through cooling liquid circulation, so that reliable control on the temperature of the battery cell in lithium battery production and matching can be realized, and integrated cooling of the battery cell module is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field, concretely relates to a cylindrical electric core module integration cooling's device. BACKGROUND

[0002] At present, there are many kinds of electric core cooling methods in the module production process, among which the most widely used is liquid cooling, which directly or indirectly cools the electric core. However, when temperature control, the temperature control is unstable, and there is a risk of thermal runaway for some electric cores in the center, thereby reducing the service life of the electric core and affecting the safety of the whole vehicle.

[0003] Therefore, in order to improve the service life of the electric core and the safety of the electric core temperature control, a simple structure, easy to assemble, and strong integrative module cooling device is provided, which is a problem to be solved in the production process of the module. UTILITY MODEL CONTENT

[0004] 1. The technical problem to be solved:

[0005] In view of the above technical problems, the utility model provides a cylindrical electric core module integration cooling device.

[0006] 2. Technical scheme:

[0007] A cylindrical electric core module integration cooling device, comprising an upper cover plate, a lower tray and an outer frame, a cooling coil and a plurality of rows of cylindrical electric cores are arranged in the outer frame, the electric cores are arranged between the upper and lower electric core pressing plates, at least one side of each row of cylindrical electric cores contacts the cooling coil, the inlet and outlet ends of the cooling coil extend from the side hole of the outer frame to the outside of the outer frame, the positive and negative poles of adjacent electric cores are connected in series by the welded copper bars, the top of the copper bar is provided with a copper bar upper pressing plate, the bottom of the copper bar is provided with a copper bar lower pressing plate, the upper cover plate is arranged on the top of the copper bar upper pressing plate, and the lower tray is arranged on the bottom of the copper bar lower pressing plate.

[0008] Preferably, the upper cover plate and the lower tray are clamped on the outer frame.

[0009] Further, the cooling coil is a continuous S-shaped structure, two rows of electric cores are arranged in the interval space of the S-shaped structure, and one row of electric cores is arranged on the outermost side of the S-shaped structure, and the side surface of the cooling coil and each row of electric cores is in contact.

[0010] Further, the cooling coil comprises a wave-shaped water channel, the inlet and outlet ends of the water channel are provided with connectors, the outer side of the water channel is covered with a uniform heat-conducting rubber layer, the heat-conducting rubber layer is in a wave shape, and the concave surfaces on both sides of the heat-conducting rubber layer are tightly combined with the side surfaces of the electric cores on both sides.

[0011] Further, the water channel is provided with a plurality of cooling liquid passages distributed vertically.

[0012] Further, the water channel is made of 3034 aluminum material with a thickness of 8mm and a surface with an oxidation layer.

[0013] Further, the electric core model is 18650.

[0014] 3. Beneficial effects:

[0015] The device has simple structure, can cool the electric core through cooling liquid circulation, can realize reliable control of the temperature of the electric core in lithium battery production and assembly, can realize integrated cooling of the electric core module, and can avoid thermal runaway caused by uneven heat dissipation in the electric core, thereby reducing the risk of reduction of the service life of the electric core and spontaneous combustion. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the device for integrated cooling of the cylindrical electric core module of the utility model;

[0017] Figure 2 It is an enlarged view of A part of Figure 1

[0018] Figure 3 It is an elevational view of Figure 1

[0019] Figure 4 It is a rear view of Figure 1

[0020] Figure 5 It is a plan view of Figure 1

[0021] Figure 6 It is a structural schematic view of the electric core lower pressing plate;

[0022] Figure 7 It is a perspective view of the cooling coil;

[0023] Figure 8 It is an enlarged view of B part of Figure 7

[0024] Figure 9 It is an elevational view of the cooling coil;

[0025] Figure 10 It is an A-A sectional view of Figure 9 DETAILED DESCRIPTION

[0026] The utility model will be specifically explained in combination with the drawings.

[0027] As shown in the accompanying Figure 1 to the accompanying Figure 10 ,​​​​​​

[0028] Specific embodiments: a cylindrical battery cell module integrated cooling device, comprising an upper cover plate 1, a lower tray 2 and an outer frame 3, the outer frame 3 is provided with cooling coils 4 and multiple rows of cylindrical battery cells 5, the battery cell 5 is 18650 type, the battery cell 5 is arranged between the battery cell upper pressing plate 6 and the battery cell lower pressing plate 7, the battery cell upper pressing plate 6 and the battery cell lower pressing plate 7 apply pressure in the upward and downward directions to ensure the height consistency of the battery cell 5; at least one side of each row of cylindrical battery cells 5 contacts the cooling coil 4, the inlet and outlet ends of the cooling coil 4 extend from the side hole of the outer frame 3 to the outside of the outer frame 33, the positive and negative electrodes of adjacent battery cells 5 are connected in series through the welded copper bars 8, in order to facilitate series connection, the polarities of the electrodes above the adjacent battery cells 5 that need to be connected in series are opposite, the top of the copper bar 8 above is provided with a copper bar upper pressing plate 9, the bottom of the copper bar 8 below is provided with a copper bar lower pressing plate 10, the upper cover plate 1 is arranged on the top of the copper bar upper pressing plate 9, the lower tray 2 is arranged on the bottom of the copper bar lower pressing plate 10, the copper bar 8 is fixed by the copper bar lower pressing plate 10 and the copper bar upper pressing plate 9, the upper cover plate 1 and the lower tray 2 are detachably connected to the outer frame 3, specifically, they can be fixed on the outer frame 3 by clamping. The upper cover plate 1 and the lower tray 2 can apply a pressure to compress and fix the internal battery cell module. When cooling is needed, the inlet and outlet ends of the cooling coil 4 are connected to circulating cooling liquid, heat exchange occurs between the cooling coil 4 and the battery cell 5, thereby achieving cooling and heat dissipation.

[0029] The cooling coil 4 is a continuous S-shaped structure, two rows of battery cells 5 are arranged in the interval space of the S-shaped structure, and one row of battery cells 5 is arranged on the outermost side of the S-shaped structure, and the cooling coil 4 and the side surface of each row of battery cells 5 are in contact. This structure design can shorten the length of the cooling coil 4 while meeting the requirement of heat dissipation through at least one side of the battery cell 5 contacting the cooling coil 4.

[0030] The cooling coil 4 comprises a wave-shaped water channel 41, the inlet and outlet ends of the water channel 41 are provided with joints 42, the outside of the water channel 41 is covered with a uniform heat-conducting rubber layer 43, the heat-conducting rubber layer 43 is in a wave shape, the concave surfaces on both sides of the heat-conducting rubber layer 43 are tightly combined with the side surfaces of the battery cells 5 on both sides, the shape design is consistent with the cylindrical structure of the battery cell 5, ensuring the maximum contact area and improving the cooling effect, and the heat-conducting rubber layer 43 avoids the direct contact between the battery cell 5 and the rigid structure of the water channel 41, preventing wear between the battery cell 5 and the water channel 41 during vehicle driving.

[0031] A plurality of cooling liquid passages 44 are arranged in the water channel 41. The water channel 41 is made of 3034 aluminum material with a thickness of 8 mm and has an oxidation layer on the surface. The arrangement of multiple cooling liquid passages 44 can improve the overall mechanical strength of the water channel 41, and the interval layer between different cooling liquid passages 44 plays the role of a reinforcing rib. In addition, the aluminum material has excellent heat transfer capacity, and the oxidation layer on the surface has wear-resistant performance.

[0032] The utility model discloses can realize the reliable control of the temperature of electric core in lithium battery production and group, realize electric core module integration cooling, and further avoid the heat runaway caused by the uneven heat dissipation of electric core internal, thereby reduce the risk of electric core life reduction and spontaneous combustion.

[0033] Although the utility model has disclosed as above with preferable embodiment, they are not used to limit the utility model, any skilled person, in not departing from the spirit and scope of the utility model, certainly can make various changes or adornment, therefore the protection scope of the utility model should be with the claim protection scope of the application of the boundary for accurate.

Claims

1. A device for integrated cooling of cylindrical battery cell modules, characterized in that, The battery includes an upper cover plate, a lower tray and an outer frame, the outer frame is provided with cooling coils and multiple rows of cylindrical battery cells, the battery cells are arranged between an upper battery cell pressing plate and a lower battery cell pressing plate, at least one side of each row of cylindrical battery cells contacts the cooling coils, the inlet and outlet ends of the cooling coils extend from the side holes of the outer frame to the outside of the outer frame, the positive and negative poles of adjacent battery cells are connected in series by copper bars through welding, the top of the upper copper bar is provided with a copper bar upper pressing plate, the bottom of the lower copper bar is provided with a copper bar lower pressing plate, the upper cover plate is arranged on the top of the copper bar upper pressing plate, and the lower tray is arranged on the bottom of the copper bar lower pressing plate; the upper cover plate and the lower tray are detachably connected to the outer frame.

2. The device for integrated cooling of cylindrical battery cell modules according to claim 1, characterized in that The upper cover plate and the lower tray are clamped on the outer frame.

3. The device for integrated cooling of cylindrical battery cell modules according to claim 1, characterized in that, The cooling coils are in a continuous S-shaped structure, two rows of battery cells are arranged in the interval space of the S-shaped structure, and one row of battery cells is arranged on the outermost side of the S-shaped structure, and the side surface of the cooling coils and each row of battery cells keeps in contact.

4. The device for integrated cooling of cylindrical battery cell modules according to claim 3, characterized in that The cooling coils include wave-shaped water channels, the inlet and outlet ends of the water channels are provided with joints, the outer side of the water channels is covered with a uniform heat-conducting rubber layer, the heat-conducting rubber layer is in a wave shape, and the concave surfaces on both sides of the heat-conducting rubber layer are tightly combined with the side surfaces of the battery cells on both sides.

5. The device for integrated cooling of cylindrical battery cell modules according to claim 4, characterized in that Multiple cooling liquid passages are arranged in the water channels in a vertical distribution.

6. The device for integrated cooling of cylindrical battery cell modules according to claim 5, characterized in that The water channels are made of 3034 aluminum material, the thickness is 8 mm, and the surface has an oxidation layer.

7. The device for integrated cooling of cylindrical battery cell modules according to claim 1, characterized in that, The battery cell model is 18650.

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