Cooling device of battery

Abstract

The utility model discloses a cooling device of a battery, the two sides of the battery are respectively provided with a tab arranged along the height direction, the cooling device comprises two side plates, and the inner sides of the two side plates are respectively provided with a contact part which can be in contact connection with the tabs; a cooling flow channel is arranged in the side plate and flows through the back face of the contact part, and the highest height of the cooling flow channel in the symmetrical area of the contact part is larger than or equal to the height of the upper end of the contact part. The lowest height of the cooling flow channel in the symmetrical area of the contact part is lower than or equal to the height of the lower end of the contact part. According to the utility model, the cooling flow channel is arranged on the side plate, so that the tab is directly attached to the contact part on the inner side of the side plate, and the cooling flow channel flows through the back surface of the contact part so as to dissipate heat of the tab, so that the problem that the heat of the tab of the battery cannot be dissipated is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cooling device. Background Art

[0002] With the development of new energy vehicles, the capacity of batteries is getting larger and larger, and the heat of batteries is also increasing. Therefore, it is necessary to dissipate the heat of batteries by installing cooling devices inside the batteries.

[0003] However, existing heat dissipation devices can only dissipate heat from the battery cells themselves through the bottom or side panels of the battery box. However, because the tabs on the battery cells protrude from the surface, they cannot directly contact the cooling channels, preventing timely heat dissipation. Furthermore, the tabs are where the battery cells generate the most heat. Without timely heat dissipation, the battery can easily overheat, leading to dangerous conditions. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a battery cooling device for solving the problem that the battery tabs cannot dissipate heat in the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is a battery cooling device, wherein two sides of the battery are respectively provided with a tab arranged in the height direction, and the cooling device comprises:

[0006] Two side plates, each of the inner sides of the two side plates is provided with a contact portion that can be in contact with the pole ear; a cooling channel is provided in the side plate, and the cooling channel flows through the back side of the contact portion, and the highest height of the cooling channel in the symmetrical area of the contact portion is higher than or equal to the upper end height of the contact portion, and the lowest height of the cooling channel in the symmetrical area of the contact portion is lower than or equal to the lower end height of the contact portion.

[0007] Furthermore, a liquid inlet and a liquid outlet are respectively connected to both ends of the cooling channel, and the height of the liquid inlet is lower than that of the liquid outlet.

[0008] Furthermore, the side plate includes an inner plate and an outer plate that are arranged opposite to each other, and the cooling channel is arranged between the inner plate and the outer plate;

[0009] A partition is further provided between the inner plate and the outer plate, and the partition separates the cooling channel into an upper channel and a lower channel. The upper channel is connected to the liquid outlet, and the lower channel is connected to the liquid inlet.

[0010] Furthermore, a blocking piece is provided at both ends of the cooling channel; a gap is provided between the end of the partition and the blocking piece, and the gap allows the coolant to flow from the lower channel to the upper channel.

[0011] Furthermore, the upper flow channel and the lower flow channel are both arranged in the horizontal direction, and the highest height of the upper flow channel is higher than or equal to the upper end height of the tab, and the lowest height of the lower flow channel is lower than or equal to the lower end height of the tab.

[0012] Furthermore, a convex strip is provided on the inner side of the two side plates, and the lower end surface of the tab abuts against the convex strip.

[0013] Furthermore, a bottom plate is included, and both ends of the bottom plate are respectively connected to one of the side plates; a cooling channel for the flow of coolant is opened in the bottom plate, and the bottom surface of the battery is in contact with the bottom plate.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] (1) A cooling channel is provided on the side plate so that the tab is directly in contact with the inner contact portion of the side plate. The cooling channel flows through the back of the contact portion and dissipates heat from the tab, thus solving the problem that the tab cannot dissipate heat.

[0016] (2) The highest height of the cooling channel area symmetrical to the contact part is higher than or equal to the highest height of the contact part, and the lowest height of the area is lower than or equal to the lowest height of the contact part, so that the cooling channel area flowing through the back of the contact part can completely cover all positions of the contact part, and any part of the tab can dissipate heat through the contact part, thereby improving the heat dissipation effect of the tab.

[0017] (3) The liquid inlet is located below the liquid outlet, so that the coolant can enter the cooling channel from the liquid inlet and flow upward to the liquid outlet. The coolant can fill the entire cooling channel under the action of its own gravity, avoiding the phenomenon that the heat dissipation effect is reduced due to the lack of coolant in some parts of the cooling channel.

[0018] (4) A partition is set to separate the cooling channel into an upper channel and a lower channel, so that the coolant flows to the right in the lower channel, and then enters the upper channel after passing through the gap and flows to the left, thereby extending the flow path of the coolant and improving the heat dissipation effect.

[0019] (5) A ridge is provided on the side panel so that the tab can be supported on the ridge. The upper surface of the ridge contacts the lower end surface of the tab, and the lower end surface of the tab can further dissipate heat through the ridge, thereby improving the heat dissipation efficiency of the tab. At the same time, the thickness of the tab ridge is equal to the thickness of the tab, so that the side of the ridge can fit on the side of the battery cell, so that the battery cell can also dissipate heat through the ridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1Schematic diagram of the structure of the cooling device and the battery in the embodiment;

[0021] Figure 2 This is a front view of the cooling device in the embodiment;

[0022] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0023] In the picture:

[0024] 100, battery cell; 110, tab;

[0025] 200, side plate; 210, cooling channel; 211, upper flow channel; 212, lower flow channel; 213, gap; 214, partition; 220, rib; 230, liquid inlet; 240, liquid outlet; 250, blocking member;

[0026] 300. Base plate. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Please refer to Figure 1-Figure 3 The present invention discloses a battery cooling device. A battery tab 110 is provided on each side of the battery along the height direction. The cooling device includes:

[0029] Two side plates 200, each of the inner sides of the two side plates 200 is provided with a contact portion that can be in contact and connected with the pole ear 110; a cooling channel 210 is provided in the side plate 200, and the cooling channel 210 flows through the back side of the contact portion, and the highest height of the cooling channel 210 in the symmetrical area of the contact portion is higher than or equal to the upper end height of the contact portion, and the lowest height of the cooling channel 210 in the symmetrical area of the contact portion is lower than or equal to the lower end height of the contact portion.

[0030] Specifically, the present application sets a cooling channel 210 on the side plate 200, so that the tab 110 is directly in contact with the contact portion on the inner side of the side plate 200. The cooling channel 210 flows through the back side of the contact portion and thereby dissipates heat from the tab 110, thereby solving the problem that the battery tab 110 cannot dissipate heat.

[0031] What is important is that since the highest height of the cooling channel 210 area symmetrical to the contact part is higher than or equal to the highest height of the contact part, and the lowest height of the area is lower than or equal to the lowest height of the contact part, the cooling channel 210 area flowing through the back of the contact part can completely cover all positions of the contact part, and any part of the pole ear 110 can dissipate heat through the contact part, thereby improving the heat dissipation effect of the pole ear 110.

[0032] It should be noted that the contact portion can be understood as the portion on the side plate 200 that contacts the tab 110. Since the inner wall of the side plate 200 is vertical and the side surfaces of the tab 110 are also vertical, the side surfaces of the tab 110 can completely fit onto the inner wall of the side plate 200. That is, the area and shape of the contact portion are identical to those of the side surfaces of the tab 110. In other words, the cooling channel 210 flowing through the back of the contact portion covers the entire contact portion, and thus the entire tab 110, thereby dissipating heat from all locations of the tab 110.

[0033] Furthermore, a liquid inlet 230 and a liquid outlet 240 are respectively connected to both ends of the cooling channel 210 , and the height of the liquid inlet 230 is lower than that of the liquid outlet 240 .

[0034] Specifically, the liquid inlet 230 is located below the liquid outlet 240, so that the coolant can enter the cooling channel 210 from the liquid inlet 230 and flow upward to the liquid outlet 240. The coolant can fill the entire cooling channel 210 under the action of its own gravity, avoiding the phenomenon that the heat dissipation effect is reduced due to the lack of coolant in some parts of the cooling channel 210.

[0035] Furthermore, the side plate 200 includes an inner plate and an outer plate that are arranged opposite to each other, and the cooling channel 210 is arranged between the inner plate and the outer plate;

[0036] A partition 214 is further provided between the inner plate and the outer plate. The partition 214 separates the cooling channel 210 into an upper channel 211 and a lower channel 212 . The upper channel 211 is connected to the liquid outlet 240 , and the lower channel 212 is connected to the liquid inlet 230 .

[0037] Furthermore, a blocking member 250 is provided at both ends of the cooling channel 210 ; a gap 213 is defined between the end of the partition 214 and the blocking member 250 , and the gap 213 allows coolant to flow from the lower channel 212 to the upper channel 211 .

[0038] Specifically, a partition 214 is provided to separate the cooling channel 210 into an upper channel 211 and a lower channel 212, so that the coolant flows to the right in the lower channel 212, and then passes through the gap 213 to enter the upper channel 211 and flows to the left, thereby extending the flow path of the coolant and improving the heat dissipation effect.

[0039] It should be mentioned that the cooling channel 210 is machined out of the side plate 200 and sealed by welding plugging pieces 250 at both ends to complete the channel sealing.

[0040] Furthermore, the upper flow channel 211 and the lower flow channel 212 are both arranged in the horizontal direction, and the highest height of the upper flow channel 211 is higher than or equal to the upper end height of the pole tab 110, and the lowest height of the lower flow channel 212 is lower than or equal to the lower end height of the pole tab 110.

[0041] Furthermore, a convex strip 220 is provided on the inner side of the two side plates 200 , and the lower end surface of the tab 110 abuts against the convex strip 220 .

[0042] Specifically, ridges 220 are provided on the side panels 200 to support the tabs 110. The upper surfaces of the ridges 220 contact the lower end surfaces of the tabs 110, allowing heat from the lower end surfaces of the tabs 110 to be further dissipated through the ridges 220, thereby improving the heat dissipation efficiency of the tabs 110. Furthermore, the thickness of the ridges 220 equals the thickness of the tabs 110, allowing the sides of the ridges 220 to fit against the sides of the battery cell 100. Heat from the battery cell 100 can also be dissipated through the ridges 220.

[0043] Furthermore, a bottom plate 300 is included, and both ends of the bottom plate 300 are respectively connected to one of the side plates 200; a cooling channel for the flow of coolant is opened in the bottom plate 300, and the bottom surface of the battery is in contact with the bottom plate 300.

[0044] Specifically, a cooling channel is provided on the bottom plate 300 to directly dissipate heat from the battery cell 100 , thereby enabling both the battery cell 100 and the tab 110 to be cooled in a timely manner, thereby enhancing the stability and safety of the battery.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A battery cooling device, wherein each side of the battery is provided with a tab arranged in the height direction, characterized in that: The cooling device comprises: Two side plates, each of the inner sides of the two side plates is provided with a contact portion that can be in contact with the pole ear; a cooling channel is provided in the side plate, and the cooling channel flows through the back side of the contact portion, and the highest height of the cooling channel in the symmetrical area of the contact portion is higher than or equal to the upper end height of the contact portion, and the lowest height of the cooling channel in the symmetrical area of the contact portion is lower than or equal to the lower end height of the contact portion.

2. A battery cooling device according to claim 1, characterized in that: A liquid inlet and a liquid outlet are respectively connected to both ends of the cooling channel, and the height of the liquid inlet is lower than that of the liquid outlet.

3. A battery cooling device according to claim 2, characterized in that: The side plate includes an inner plate and an outer plate that are arranged opposite to each other, and the cooling channel is arranged between the inner plate and the outer plate; A partition is further provided between the inner plate and the outer plate, and the partition separates the cooling channel into an upper channel and a lower channel. The upper channel is connected to the liquid outlet, and the lower channel is connected to the liquid inlet.

4. A battery cooling device according to claim 3, characterized in that: A blocking piece is provided at both ends of the cooling channel; a gap is provided between the end of the partition plate and the blocking piece, and the gap allows the coolant to flow from the lower channel to the upper channel.

5. The battery cooling device according to claim 3, characterized in that: The upper flow channel and the lower flow channel are both arranged in the horizontal direction, and the highest height of the upper flow channel is higher than or equal to the upper end height of the tab, and the lowest height of the lower flow channel is lower than or equal to the lower end height of the tab.

6. The battery cooling device according to claim 1, characterized in that: The inner sides of the two side plates are further provided with a convex strip, and the lower end surface of the tab abuts against the convex strip.

7. The battery cooling device according to claim 1, characterized in that: It also includes a bottom plate, both ends of which are connected to one of the side plates respectively; a cooling channel for the flow of coolant is opened in the bottom plate, and the bottom surface of the battery abuts against the bottom plate.

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