Energy storage battery module capable of efficiently dissipating heat

Abstract

The invention discloses an efficient heat dissipation energy storage battery module which comprises a shell, an air inlet and an air outlet are formed in the side wall of the shell, a heat dissipation fan is arranged on the air outlet, a central air duct is arranged in the shell and communicated with the air outlet, a plurality of battery cells distributed in parallel are arranged in the shell, and heat dissipation partition plates are arranged between the adjacent battery cells. The front end face and the rear end face of the heat dissipation partition plate abut against the adjacent battery cells respectively, a heat dissipation air channel is arranged in the heat dissipation partition plate and communicated with the central air channel and the air inlet respectively, the front end face and the rear end face of the heat dissipation partition plate are provided with communication parts respectively, and the communication parts are communicated with the heat dissipation air channel and the adjacent battery cells respectively. The end face of the battery cell directly communicates with the heat dissipation air channel, heat conduction through a heat dissipation partition plate is not needed, the heat dissipation efficiency can be effectively improved, and work safety is guaranteed; and efficient heat dissipation can be realized without depending on the material heat conductivity coefficient of the heat dissipation partition plate, so that the manufacturing cost of the battery module is better controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to an energy storage battery module with high-efficiency heat dissipation. Background Art

[0002] The battery energy storage system is an energy storage system composed of batteries and parallel voltage converters. There are multiple battery modules in the battery energy storage system, and each battery module is composed of multiple battery cells connected in series. The battery cells will inevitably generate heat during the charging and discharging process. Therefore, the existing battery modules are basically equipped with a heat dissipation structure to ensure the safety of the battery cells.

[0003] The heat dissipation structure in the existing battery module is basically to set a heat dissipation partition between two battery cells, and a heat dissipation cavity is set in the heat dissipation partition. The heat generated by the battery cell will exchange heat with the heat dissipation partition, and the heat on the heat dissipation partition will dissipate into the heat dissipation cavity; and the heat dissipation fan works to make the external cold air flow into the heat dissipation cavity, taking away the heat in the heat dissipation cavity, thereby achieving the purpose of heat dissipation of the battery cell. However, this heat dissipation structure still has at least the following problems:

[0004] 1. The contact surfaces between the battery cell and the heat dissipation baffle are both solid metal surfaces. This means that when working, the heat generated by the battery cell first enters the metal material of the heat dissipation baffle through heat conduction, and then conducts to the heat dissipation cavity; only when the heat is conducted to the heat dissipation cavity can it be taken away by the cold air, resulting in relatively low heat dissipation efficiency.

[0005] 2. The heat dissipation performance of this heat dissipation structure is very dependent on the thermal conductivity of the heat dissipation baffle material itself. The heat dissipation effect will be extremely poor if the thermal conductivity is low. The use of materials with very high thermal conductivity may result in high procurement costs, leading to increased production costs. Summary of the invention

[0006] In order to solve some or all of the problems existing in the above-mentioned prior art, the present invention provides an energy storage battery module with efficient heat dissipation, including a shell, side walls of the shell are provided with an air inlet and an air outlet, the air outlet is provided with a cooling fan, a central air duct is provided in the shell, the central air duct is connected with the air outlet, a plurality of battery cells distributed in parallel are provided in the shell, a heat dissipation baffle is provided between adjacent battery cells, the front and rear end surfaces of the heat dissipation baffle are respectively abutted against adjacent battery cells, a heat dissipation air duct is provided in the heat dissipation baffle, the heat dissipation air duct is respectively connected with the central air duct and the air inlet, and connecting parts are respectively provided on the front and rear end surfaces of the heat dissipation baffle, and the connecting parts are respectively connected with the heat dissipation air duct and adjacent battery cells.

[0007] As a further improvement of the present invention, the connecting portion is a hollow hole arranged on the end surface of the heat dissipation baffle, the hollow hole is connected to the heat dissipation air duct, and the hollow hole passes through the front and rear end surfaces of the heat dissipation baffle.

[0008] As a further improvement of the present invention, the number of the hollow holes is four, and the four hollow holes are distributed in a circular array along the geometric center of the heat dissipation baffle.

[0009] As a further improvement of the present invention, the orthographic projection shape of the hollow hole is a triangle.

[0010] As a further improvement of the present invention, X-shaped support strips are respectively provided on the front and rear end surfaces of the heat dissipation baffle, and the center of the X-shaped support strip coincides with the intersection of the diagonals of the heat dissipation baffle.

[0011] As a further improvement of the present invention, a support column is provided in the heat dissipation duct, and both ends of the support column are respectively connected to the X-shaped support bar.

[0012] As a further improvement of the present invention, the support column includes a first support column and a second support column, the center of the first support column coincides with the center of the X-shaped support bar, and the second support columns are symmetrically distributed on both sides of the first support column.

[0013] As a further improvement of the present invention, the connecting portion includes a first window and a second window of the same size and shape, the first window is arranged on the front end surface of the heat dissipation baffle, and the second window is arranged on the rear end surface of the heat dissipation baffle, the first window and the second window are respectively connected to the heat dissipation air duct, and the first window and the second window are staggered.

[0014] As a further improvement of the present invention, a plurality of air duct reinforcement ribs are provided in the heat dissipation air duct, and the air duct reinforcement ribs are connected to the heat dissipation baffle.

[0015] As a further improvement of the present invention, longitudinal support blocks are provided on the heat dissipation baffle, and the longitudinal support blocks are distributed on the left and right sides of the first window and the second window, and the front and rear end surfaces of the longitudinal support blocks are respectively abutted against adjacent battery cells.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a connecting portion on the end surface of the heat dissipation baffle, and the connecting portion is connected to the heat dissipation duct and the battery cell respectively, so that the position area corresponding to the end surface of the battery cell and the connecting portion can be directly connected to the heat dissipation duct, so that the heat generated by the battery cell can be directly dissipated into the heat dissipation duct without heat conduction through the heat dissipation baffle, which can effectively improve the heat dissipation efficiency and ensure work safety.

[0018] 2. In the present invention, the battery cell is directly connected to the heat dissipation duct, so there is no need for heat conduction through the heat dissipation baffle, and efficient heat dissipation can be achieved without relying on the thermal conductivity of the material of the heat dissipation baffle. More cost-effective materials can be selected to make it, thereby better controlling the production cost of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the present invention or the solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a schematic diagram of the external structure of embodiment 1 of the present invention;

[0021] Figure 2 is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0022] Figure 3 is a schematic structural diagram of a heat dissipation baffle in Embodiment 1 of the present invention;

[0023] Figure 4 is a schematic diagram of the internal structure of the heat dissipation baffle in Example 1 of the present invention;

[0024] Figure 5 is a schematic structural diagram of a heat dissipation baffle in Embodiment 2 of the present invention;

[0025] Figure 6 is a front view structural schematic diagram of the heat dissipation baffle in Example 2 of the present invention;

[0026] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure of AA. DETAILED DESCRIPTION

[0027] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs; the terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0028] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] Embodiment 1:

[0031] like Figure 1-4 As shown, an energy storage battery module with high efficiency in heat dissipation comprises a shell 1, an air inlet 11 and an air outlet 12 are arranged on the side wall of the shell 1, a heat dissipation fan 2 is installed on the air outlet 12, a central air duct 3 is installed in the shell 1, and the central air duct 3 is connected with the air outlet 12; when working, the heat dissipation fan 2 is controlled to work, so that the air in the central air duct 3 can be extracted and sent out of the shell 1 from the air outlet 12. A plurality of battery cells 4 arranged in parallel are arranged in the shell 1, and two locking steel belts 5 are sleeved on the periphery of the battery cells 4, and all the battery cells 4 are fixed by the locking steel belts 5 to form a whole, thereby improving the stability of the structure. A heat dissipation baffle 6 is arranged between two adjacent battery cells 4, and the front and rear end surfaces of the heat dissipation baffle 6 are respectively in contact with the adjacent battery cells 4, and a heat dissipation air duct 61 is arranged in the heat dissipation baffle 6, and the heat dissipation air duct 61 is respectively connected with the central air duct 3 and the air inlet 11.

[0032] During operation, the heat generated by charging and discharging the battery cell 4 will be conducted to the heat dissipation duct 61 through the heat dissipation baffle 6. The heat dissipation fan 2 will work to make the air in the central duct 3 flow out toward the air outlet 12, and the external cold air will flow into the outer shell 1 through the air inlet 11, and then flow into the heat dissipation duct 61 to take away the heat, and then flow into the central duct 3, thereby realizing air flow circulation and dissipating the heat of the battery cell 4.

[0033] In order to reduce dust from entering the housing 1, an air inlet dust cover 7 is provided on the air inlet 11, and the air inlet dust cover 7 is fixedly connected to the housing 1. The air inlet dust cover 7 can reduce dust from entering the housing 1, thereby improving the working stability of the battery module and extending the service life.

[0034] In this embodiment, the heat dissipation duct 61 runs through the left and right sides of the heat dissipation baffle 6. The transversely distributed heat dissipation duct 61 can be directly connected to the air inlet 11, so that the cold air entering the air inlet 11 can directly flow into the heat dissipation duct 61, thereby improving the heat dissipation efficiency.

[0035] In order to further improve the heat dissipation efficiency, connecting parts are respectively provided on the front and rear end surfaces of the heat dissipation baffle 6, and the connecting parts are respectively connected to the heat dissipation duct 61 and the connected battery cells 4. The battery module is provided with connecting parts on the end surface of the heat dissipation baffle 6, and the connecting parts are respectively connected to the heat dissipation duct 61 and the battery cells 4, so that the position area corresponding to the end surface of the battery cell 4 and the connecting parts can be directly connected to the heat dissipation duct 61, so that the heat generated by the battery cell 4 can be directly dissipated into the heat dissipation duct 61, without the need for heat conduction through the heat dissipation baffle 6, which can effectively improve the heat dissipation efficiency and ensure work safety. Moreover, the battery cell 4 is directly connected to the heat dissipation duct 61, so there is no need for heat conduction through the heat dissipation baffle 6, and there is no need to rely on the thermal conductivity of the material of the heat dissipation baffle 6 to achieve efficient heat dissipation, and can be made of materials with better prices, thereby better controlling the production cost of the battery module.

[0036] In this embodiment, the connecting portion is a hollow hole 62 provided on the end surface of the heat dissipation baffle 6, the hollow hole 62 is connected to the heat dissipation air duct 61, and the hollow hole 62 passes through the front and rear end surfaces of the heat dissipation baffle 6. Through the hollow hole 62, the position area corresponding to the battery cell 4 and the hollow hole 62 can be directly connected to the heat dissipation air duct 61, so that the heat generated by the battery cell 4 can be directly dissipated into the heat dissipation air duct 61, thereby improving the heat dissipation efficiency. In other embodiments, the hollow hole 62 may not pass through the front and rear end surfaces of the heat dissipation baffle 6, but the hollow holes 62 on the front and rear end surfaces of the heat dissipation baffle 6 are staggered, which can also achieve the same technical efficiency.

[0037] There are four hollow holes 62, and the four hollow holes 62 are distributed in a circular array along the geometric center of the heat dissipation baffle 6; by providing four hollow holes 62, the contact area between the end face of the battery cell 4 and the heat dissipation duct 61 can be increased, thereby improving the heat dissipation efficiency. The orthographic projection shape of the hollow hole 62 is a triangle. In other embodiments, the hollow holes 62 can also be any other number or any shape, which is not limited by the present invention.

[0038] In order to ensure the structural rigidity of the heat dissipation baffle 6, the heat dissipation baffle 6 can be made of a hard metal material, and an X-shaped support bar 63 is respectively provided on the front and rear end surfaces of the heat dissipation baffle 6, and the center of the X-shaped support bar 63 coincides with the intersection of the diagonal lines of the heat dissipation baffle 6. In this embodiment, the X-shaped support bar 63 is also a part of the heat dissipation baffle 6. By retaining the X-shaped support bar 63 on the front and rear end surfaces of the heat dissipation baffle 6, the structural rigidity of the heat dissipation baffle 6 can be ensured to prevent the battery cell 4 from breaking or deforming it.

[0039] In this embodiment, the X-shaped support strips 63 on the front and rear end surfaces of the heat dissipation baffle 6 are arranged corresponding to each other; in other embodiments, the X-shaped support strips 63 on the front and rear end surfaces of the heat dissipation baffle 6 can also be staggered, and the shape of the support strips can also be any other shape. It is only necessary to ensure that a part of the support structure is reserved on the end surface when processing and opening the hollow hole 62.

[0040] In order to further improve the structural rigidity of the heat dissipation baffle 6, a support column is provided in the heat dissipation air duct 61, and the two ends of the support column are respectively connected to the X-shaped support strip 63. In this embodiment, the support column and the heat dissipation baffle 6 are integrally formed; in other embodiments, the support column can also be an independent component, which can be fixed to the heat dissipation baffle 6 by welding or screwing. By providing the support column in the heat dissipation air duct 61, the overall structural rigidity of the heat dissipation baffle 6 can be improved, and the possibility of deformation and breakage of the heat dissipation baffle 6 during assembly or use can be reduced.

[0041] Specifically, in this embodiment, the support column includes a first support column 64 and a second support column 65. The first support column 64 is arranged at the center of the X-shaped support bar 63, and the center of the first support column 64 coincides with the center of the X-shaped support bar 63. There are four second support columns 65, and the four second support seats are symmetrically distributed on both sides of the first support column 64; that is, there is a second support column 65 on each of the four sides of the X-shaped support bar 63. The cooperation of the first support column 64 and the second support column 6545 can make the end surface of the heat dissipation baffle 6 bear force evenly, ensure the overall structural rigidity of the heat dissipation baffle 6, and prevent deformation and fracture.

[0042] In other embodiments, the number of the second support pillars 65 may be any other number, as long as they are symmetrically distributed in pairs on both sides of the first support pillar 64 .

[0043] Embodiment 2:

[0044] The difference between this embodiment and embodiment 1 is that the structure of the heat dissipation baffle 6 is different, specifically:

[0045] like Figure 5-7 As shown, in this embodiment, the connecting portion on the heat dissipation baffle 6 includes a first window 66 and a second window 67 of the same size and shape. The first window 66 is arranged on the front end surface of the heat dissipation baffle 6, and the second window 67 is arranged on the rear end surface of the heat dissipation baffle 6. The first window 66 and the second window 67 are respectively connected to the heat dissipation duct 61, and the first window 66 and the second window 67 are staggered. Through the first window 66 and the second window 67, part of the end surface of the battery cell 4 is directly connected to the heat dissipation duct 61, so that the heat generated by the battery cell 4 can be directly dissipated into the heat dissipation duct 61, effectively improving the heat dissipation efficiency.

[0046] The first window 66 and the second window 67 are of the same size and shape, which makes it convenient for operators to assemble the battery module without having to check the front and back sides of the heat dissipation baffle 6 for installation, thereby improving the convenience of assembly.

[0047] At the same time, the first window 66 and the second window 67 are staggered, which can ensure that the heat dissipation baffle 6 retains sufficient structural rigidity and reduce the risk of the heat dissipation baffle 6 being deformed or broken by compression.

[0048] In order to improve the structural rigidity of the heat dissipation baffle 6, a plurality of air duct reinforcement ribs 68 are provided in the heat dissipation air duct 61, and the air duct reinforcement ribs 68 are respectively connected to the two end faces of the heat dissipation baffle 6. The air duct reinforcement ribs 68 can improve the overall structural rigidity of the heat dissipation baffle 6, avoid the situation that the battery cell 4 presses and deforms the heat dissipation baffle 6 when the locking steel belt 5 is tightened, and improve the stability of the structure. The battery module separates the first window 66 and the second window 67 by the air duct reinforcement ribs 68, so that there is always a part of the end face of the heat dissipation baffle 6 with material, thereby improving the overall structural rigidity of the heat dissipation baffle 6.

[0049] A longitudinal support block 69 is provided on the heat dissipation baffle 6; the longitudinal support blocks 69 are distributed on the left and right sides of the first window 66 and the second window 67, and the front and rear end surfaces of the longitudinal support blocks 69 are respectively in contact with the adjacent battery cells 4. In this embodiment, the longitudinal support block 69 is also a part of the heat dissipation baffle 6; in the process of making the heat dissipation baffle 6, when the first window 66 and the second window 67 are opened using a tool, the longitudinal support blocks 69 are respectively reserved on both sides of the heat dissipation baffle 6, so that the first window 66 and the second window 67 do not horizontally penetrate the heat dissipation baffle 6. By retaining the longitudinal support blocks 69, the structural rigidity of the heat dissipation baffle 6 can be improved, the possibility of the heat dissipation baffle 6 being deformed by the battery cells 4 can be reduced, and the stability of the structure can be improved.

[0050] The above-mentioned specific implementation is a preferred implementation of the present invention, and is not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. An energy storage battery module with high heat dissipation efficiency, characterized by: It includes a shell, the side wall of the shell is provided with an air inlet and an air outlet, the air outlet is provided with a cooling fan, the shell is provided with a central air duct, the central air duct is communicated with the air outlet, the shell is provided with a plurality of battery cells distributed in parallel, a heat dissipation baffle is provided between adjacent battery cells, the front and rear end surfaces of the heat dissipation baffle are respectively abutted against adjacent battery cells, a heat dissipation duct is provided in the heat dissipation baffle, the heat dissipation duct is respectively communicated with the central air duct and the air inlet, the front and rear end surfaces of the heat dissipation baffle are respectively provided with connecting parts, the connecting parts are respectively communicated with the heat dissipation duct and adjacent battery cells.

2. The energy storage battery module with high heat dissipation efficiency according to claim 1 is characterized in that: The connecting portion is a hollow hole arranged on the end surface of the heat dissipation baffle, the hollow hole is connected to the heat dissipation air duct, and the hollow hole passes through the front and rear end surfaces of the heat dissipation baffle.

3. The energy storage battery module with high efficiency heat dissipation according to claim 2 is characterized in that: There are four hollow holes, and the four hollow holes are distributed in a circular array along the geometric center of the heat dissipation baffle.

4. The energy storage battery module with high heat dissipation efficiency according to claim 3 is characterized in that: The orthographic projection shape of the hollow hole is a triangle.

5. The energy storage battery module with high heat dissipation efficiency according to any one of claims 2 to 4, characterized in that: The front and rear end surfaces of the heat dissipation baffle are respectively provided with X-shaped support strips, and the center of the X-shaped support strip coincides with the intersection of the diagonal lines of the heat dissipation baffle.

6. The energy storage battery module with high efficiency heat dissipation according to claim 5 is characterized in that: A support column is arranged in the heat dissipation air duct, and two ends of the support column are respectively connected to the X-shaped support bar.

7. The energy storage battery module with high heat dissipation efficiency according to claim 6, characterized in that: The support column includes a first support column and a second support column. The center of the first support column coincides with the center of the X-shaped support bar, and the second support columns are symmetrically distributed on both sides of the first support column.

8. The energy storage battery module with high heat dissipation efficiency according to claim 1, characterized in that: The connecting portion includes a first window and a second window of the same size and shape. The first window is arranged on the front end surface of the heat dissipation baffle, and the second window is arranged on the rear end surface of the heat dissipation baffle. The first window and the second window are respectively connected to the heat dissipation air duct, and the first window and the second window are staggered.

9. The energy storage battery module with high efficiency heat dissipation according to claim 7, characterized in that: A plurality of air duct reinforcing ribs are arranged in the heat dissipation air duct, and the air duct reinforcing ribs are connected to the heat dissipation baffle.

10. The energy storage battery module with high efficiency heat dissipation according to claim 8, characterized in that: The heat dissipation baffle is provided with longitudinal support blocks, which are distributed on the left and right sides of the first window and the second window, and the front and rear end surfaces of the longitudinal support blocks are respectively in contact with adjacent battery cells.

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