Criss-cross shunt and energy storage battery box

Abstract

The utility model discloses a criss-cross type flow divider which is formed by sequentially stacking N stages of vertical type flow dividing sections and N + 1 stages of transverse type flow dividing sections in a criss-cross mode or sequentially stacking N stages of transverse type flow dividing sections and N + 1 stages of vertical type flow dividing sections in a criss-cross mode. The first-stage vertical shunting section or the first-stage horizontal shunting section of the crisscrossed shunt is close to the environment side, and the (N + 1) th-stage vertical shunting section or the (N + 1) th-stage horizontal shunting section of the crisscrossed shunt is close to the battery side; wherein a partition is arranged in the middle area of each of the transverse flow-dividing sections and the vertical flow-dividing sections, and each of the transverse flow-dividing sections and the vertical flow-dividing sections is divided into two independent ventilation windows by the partition. The crisscrossed shunt disclosed by the utility model is compact and novel in structure, and solves the problems of non-uniform flow distribution, overlarge air supply quantity and the like of an air cooling heat dissipation system of the existing energy storage battery, so that the aims of improving the temperature uniformity of a battery pack, saving energy and the like are fulfilled. The utility model further discloses an energy storage battery box.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a criss-cross type shunt and an energy storage battery box. Background Art

[0002] At present, the main energy storage method is battery energy storage. The battery energy storage system is composed of a large number of single cells connected in series and parallel. In addition, the internal space of the energy storage system is small, compact and relatively closed, which brings huge challenges to the heat dissipation of the energy storage battery. If effective heat dissipation measures are not taken, it will not only affect the working performance and service life of the energy storage battery, but it is also likely to cause thermal runaway of the battery, leading to accidents such as fire, seriously affecting the safety of system operation. Therefore, it is of great significance to conduct thermal management of energy storage batteries, select appropriate cooling solutions, and ensure that the batteries work in a suitable temperature range to ensure the safe and reliable operation of the system.

[0003] The structure of the thermal management system must meet the characteristics of compact structure, low cost, high safety and strong universality. In addition, it is necessary to consider economic requirements and meet environmental conditions such as environmental friendliness and resource conservation. Air cooling technology is currently the preferred solution for heat dissipation of energy storage batteries. It has many advantages such as simple structure, low cost, easy maintenance, and no risk of leakage. However, due to the low specific heat capacity and thermal conductivity of air, its application in environments with high heat flux density needs further research. In addition, in order to meet the needs of intensive heat dissipation of large energy storage batteries, the existing air supply solutions have the problems of excessive cooling capacity and poor temperature uniformity. Summary of the invention

[0004] In view of the above shortcomings of the prior art, one aspect of the utility model is to provide a criss-cross type diverter to solve the problems of the existing air cooling and heat dissipation system of the energy storage battery, which not only occupies a large space, but also has uneven flow distribution and excessive air supply, so as to achieve the purpose of improving the temperature uniformity of the battery pack and saving energy.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A crisscross shunt, wherein the crisscross shunt is formed by stacking a total of N levels of vertical shunt sections and a total of N+1 levels of horizontal shunt sections in a crisscross manner, wherein N is a non-zero natural number; the first level of the horizontal shunt section of the crisscross shunt is close to the environment side, and the N+1 level of the horizontal shunt section is close to the battery side, and the vertical shunt section is arranged between two adjacent horizontal shunt sections;

[0007] Alternatively, the criss-cross type diverter is formed by stacking a total of N levels of horizontal diverter sections and a total of N+1 levels of vertical diverter sections in a criss-cross manner, wherein N is a non-zero natural number; the first level of vertical diverter sections of the criss-cross type diverter is close to the environment side, and the N+1 level of vertical diverter sections is close to the battery side, and the horizontal diverter sections are arranged between two adjacent vertical diverter sections;

[0008] Among them, a partition is provided in the middle area of ​​the horizontal diversion section and the vertical diversion section, and the partition divides each horizontal diversion section and the vertical diversion section into two independent ventilation windows; the partition of the horizontal diversion section is arranged horizontally, while the partition of the vertical diversion section is arranged vertically.

[0009] As a preferred technical solution, when the first level horizontal diversion section of the criss-cross diverter is close to the environment side, and the N+1th level horizontal diversion section is close to the battery side, the Nth level vertical diversion section of the criss-cross diverter is composed of 2 2N-1 The N+1st level horizontal flow divider consists of 2 2N The first-level horizontal diversion section only includes one horizontal diversion section.

[0010] As a preferred technical solution, when the first vertical diversion section of the criss-cross diverter is close to the environment side, and the N+1th vertical diversion section is close to the battery side, the Nth horizontal diversion section of the criss-cross diverter is composed of 2 2N-1 The N+1st level vertical flow divider consists of 2 2N The first-stage vertical diversion section only includes one vertical diversion section.

[0011] As a preferred technical solution, when N is 2, the criss-cross diverter is stacked in a criss-cross pattern from the environment side to the battery side, in sequence, by a first-level horizontal diverter section, a first-level vertical diverter section, a second-level horizontal diverter section, a second-level vertical diverter section, and a third-level horizontal diverter section; the first-level horizontal diverter section is close to the environment side, and the third-level horizontal diverter section is close to the battery side; the first-level horizontal diverter section includes only one horizontal diverter section, the first-level vertical diverter section is composed of two vertical diverter sections, the second-level horizontal diverter section is composed of four horizontal diverter sections, and the second-level vertical diverter section is composed of four vertical diverter sections. The first-level horizontal diversion section is composed of 8 vertical diversion sections, and the third-level horizontal diversion section is composed of 16 horizontal diversion sections; each ventilation window of the first-level horizontal diversion section is independently connected to the two ventilation windows of the first-level vertical diversion section, each ventilation window of the first-level vertical diversion section is independently connected to the two ventilation windows of the second-level horizontal diversion section, each ventilation window of the second-level horizontal diversion section is independently connected to the two ventilation windows of the second-level vertical diversion section, and each ventilation window of the second-level vertical diversion section is independently connected to the two ventilation windows of the third-level horizontal diversion section.

[0012] As a preferred technical solution, the third-stage horizontal diversion section is arranged in a 4*4 array, and each row includes 8 ventilation windows.

[0013] Another aspect of the utility model is to provide an energy storage battery box, which includes a box body that can accommodate energy storage batteries and at least one criss-cross shunt as described above, which is arranged in the box body.

[0014] As a preferred technical solution, the box body includes an air inlet window and an air outlet window; a criss-cross flow divider is arranged on the side of the box body close to the air inlet window.

[0015] As a preferred technical solution, the air inlet window is arranged correspondingly to the two ventilation windows of the first-stage vertical diversion section or the first-stage horizontal diversion section and remains connected.

[0016] As a preferred technical solution, the box body includes an air inlet window and an air outlet window; a criss-cross flow divider is respectively arranged on the side of the box body close to the air inlet window and the side of the air outlet window.

[0017] As a preferred technical solution, the air inlet window is arranged correspondingly with the two ventilation windows of the first-level vertical diversion section or the first-level horizontal diversion section and remains connected; the air outlet window is also arranged correspondingly with the two ventilation windows of the first-level vertical diversion section or the first-level horizontal diversion section and remains connected.

[0018] Beneficial effects of the utility model:

[0019] The utility model has a novel structural design of the criss-cross type diverter. The structural design is carried out by stacking a total of N levels of horizontal diverter sections and a total of N+1 levels of vertical diverter sections in a criss-cross manner, or by stacking a total of N levels of vertical diverter sections and a total of N+1 levels of horizontal diverter sections in a criss-cross manner. This not only makes the diverter structure simple and compact, but also enables the diverter to evenly distribute the air flow, thereby achieving the purposes of improving the temperature uniformity of the battery pack and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1a and Figure 1b It is a schematic diagram of the three-dimensional structure of the criss-cross type diverter of Example 1 of the utility model from different viewing angles.

[0021] Figure 2 It is a structural schematic diagram of the first-stage horizontal diversion section in Example 1 of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the first-stage vertical diversion section in Example 1 of the utility model.

[0023] Figure 4 It is a schematic structural diagram of the second-stage horizontal diversion section in Example 1 of the utility model.

[0024] Figure 5 It is a structural schematic diagram of the second-stage vertical diversion section in Example 1 of the utility model.

[0025] Figure 6a and Figure 6b It is a schematic diagram of the three-dimensional structure of the third-level horizontal diversion section in Example 1 of the utility model from different viewing angles.

[0026] Figure 7 It is a rear view of the criss-cross type diverter of Example 1 of the utility model.

[0027] Figure 8 It is a top view of the criss-cross type diverter of Example 1 of the utility model.

[0028] Fig. 9 This is a schematic diagram of the appearance structure of the energy storage battery box in Example 1 of the utility model.

[0029] Fig.10 This is a perspective view of the internal structure of the energy storage battery box in Example 1 of the utility model.

[0030] Among them, the box body 1, the criss-cross diverter 2, the battery pack 3, the partition 21, the single battery 31, the first-level horizontal diverter section 201, the first-level vertical diverter section 202, the second-level horizontal diverter section 203, the second-level vertical diverter section 204, the third-level horizontal diverter section 205, the air inlet window 1a, the air outlet window 1b, and the ventilation window 2a. DETAILED DESCRIPTION

[0031] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention.

[0032] Example 1

[0033] As shown in Figure 1 to Fig.10 As shown, the criss-cross diverter 2 of this embodiment is composed of a total of 2 levels of vertical diverter sections and a total of 3 levels of horizontal diverter sections stacked in a criss-cross manner; the criss-cross diverter 2 is composed of a first-level horizontal diverter section 201, a first-level vertical diverter section 202, a second-level horizontal diverter section 203, a second-level vertical diverter section 204, and a third-level horizontal diverter section 205 stacked in a criss-cross manner from the environment side toward the battery side. The first-level horizontal diverter section 201 of the criss-cross diverter 2 is close to the environment side, while the third-level horizontal diverter section 205 is close to the battery side. The vertical diverter section is arranged between two adjacent horizontal diverter sections. The vertical diverter section refers to the first-level vertical diverter section 202 or the second-level vertical diverter section 204, and the horizontal diverter section refers to the first-level horizontal diverter section 201, the second-level horizontal diverter section 203 or the third-level horizontal diverter section 205; wherein, a partition 21 is provided in the middle area of ​​all horizontal diverter sections and vertical diverter sections, and the partition 21 separates each horizontal diverter section and vertical diverter section into two An independent ventilation window 2a; the partition 21 of the vertical diversion section is arranged horizontally, and each airflow entering the vertical diversion section is divided into two by the horizontal partition 21 and flows along the longitudinal direction, and then enters the adjacent horizontal diversion section of the next level; correspondingly, the partition 21 of the horizontal diversion section is arranged vertically, and each airflow entering the horizontal diversion section is divided into two by the longitudinal partition 21 and flows along the transverse direction, and then enters the adjacent vertical diversion section of the next level (wherein, the airflow divided into two by the third-level horizontal diversion section 205 directly enters the spacing pores of the adjacent batteries of the battery pack 3). It should be pointed out that the partitions in each horizontal diversion section and each vertical diversion section of the present application can adopt different structures and size designs, as long as they can achieve the purpose of evenly distributing the flow by dividing one airflow into two.

[0034] The first-stage horizontal diversion section 201 includes only one horizontal diversion section, the first-stage vertical diversion section 202 is composed of two vertical diversion sections of the same size structure, the second-stage horizontal diversion section 203 is composed of four horizontal diversion sections of the same size structure, the second-stage vertical diversion section 204 is composed of eight vertical diversion sections of the same size structure, and the third-stage horizontal diversion section 205 is composed of 16 horizontal diversion sections of the same size structure; each ventilation window 2a of the first-stage horizontal diversion section 201 is independently The two ventilation windows 2a of the first-stage vertical diverter section 202 are connected, each ventilation window 2a of the first-stage vertical diverter section 202 is independently connected to the two ventilation windows 2a of the second-stage horizontal diverter section 203, each ventilation window 2a of the second-stage horizontal diverter section 203 is independently connected to the two ventilation windows 2a of the second-stage vertical diverter section 204, and each ventilation window 2a of the second-stage vertical diverter section 204 is independently connected to the two ventilation windows 2a of the third-stage horizontal diverter section 205. The third-stage horizontal diverter section 205 is arranged in a 4*4 array, each row includes 8 ventilation windows 2a, and 4 rows have a total of 32 ventilation windows 2a for airflow circulation.

[0035] The criss-cross flow divider 2 of this embodiment can play a role in flow distribution. The flow diversion method in the vertical and horizontal cross planes is adopted to improve the flow unevenness caused by continuous flow diversion in the same plane, and has a better flow distribution effect, so that the flow of the heat exchange medium in each parallel flow channel is the same, and then each parallel flow channel has the same heat exchange capacity, ensuring that the battery pack 3 module has good temperature uniformity; at the same time, it avoids the problems of excessive air supply and uneven air supply of the external fan, and reduces the energy consumption of the entire air cooling system. In addition, the continuous flow diversion method in the vertical and horizontal cross planes is adopted, which is conducive to reducing the volume of the flow divider and increasing the energy density of the energy storage battery in the energy storage battery box while improving the uniformity of flow distribution.

[0036] like Fig. 9 and 10As shown, the energy storage battery box of this embodiment includes a box body 1 that can accommodate energy storage batteries and two criss-cross diverters 2 arranged in the box body 1. The box body 1 includes an air inlet window 1a and an air outlet window 1b; a criss-cross diverter 2 is respectively arranged on the side of the box body 1 close to the air inlet window 1a and the side of the air outlet window 1b. The air inlet window 1a is correspondingly arranged with the two ventilation windows 2a of the first-level horizontal diverter section 201 and maintained in communication; the air outlet window 1b is also correspondingly arranged with the two ventilation windows 2a of the first-level horizontal diverter section 201 in another criss-cross diverter 2 and maintained in communication. A battery pack 3 consisting of 168 single cells 31 can be arranged in the box body 1, and the battery pack 3 is divided into four layers, and each layer is arranged in 6*7 equal distances. When the criss-cross diverter 2 is arranged at the air inlet window 1a near the box body 1, the fresh air intake airflow can be evenly distributed, and after further passing through the battery pack 3, it is gathered and flowed out by the criss-cross diverter 2 near the air outlet window 1b side of the box body 1. During specific use, fresh air enters the first-level horizontal diversion section 201 of the criss-cross diverter 2 through the air inlet window 1a of the box body 1, and the flow is evenly distributed through the two separated ventilation windows 2a. After the fresh air is divided into two, the two streams of fresh air gas flow into the two first-level vertical diversion sections 202 adjacent to the first-level horizontal diversion section 201 along the horizontal diversion; the airflow is evenly distributed in the same way, and continues through the alternating arrangement of the second-level horizontal diversion section 203, the second-level vertical diversion section 204 and the third-level horizontal diversion section 205, and the above-mentioned airflow distribution process is repeated. A stream of fresh air at the entrance of the box body 1 is evenly divided into 32 streams, and each airflow outlet corresponds to the horizontal spacing between the rows of single batteries 31, thereby ensuring that each channel has the same heat exchange capacity, thereby avoiding large temperature unevenness during the charging and discharging process of the battery pack 3.

[0037] In this embodiment, two criss-cross flow diverters 2 are symmetrically arranged in the box body 1. The air inlet window 1a can be switched to be used as the air outlet window 1b in actual use; and the air outlet window 1b is correspondingly switched to be used as the air inlet window 1a. In specific use, the energy storage battery box is externally connected to a blower for air supply, which can adopt a flexible air supply method to meet the thermal management requirements of the battery pack 3 under different discharge conditions. Under low-rate discharge conditions, a single-inlet and single-outlet air supply scheme is adopted (that is, the air inlet window 1a and the air outlet window 1b always serve as the air inlet and outlet of the fresh air respectively), and under high-rate discharge conditions, an alternating air supply scheme is adopted (that is, the air inlet window 1a and the air outlet window 1b are switched, and the fresh air is replaced by the original air outlet window 1b for air intake and discharged from the original air inlet window 1a, without changing the structure of the criss-cross flow diverter 2, and only the air supply direction of the blower needs to be switched), thereby further ensuring that the battery pack 3 is within a suitable temperature range under different discharge conditions. There is no need to modify the original air cooling heat management structure, which reduces the maximum temperature and temperature non-uniformity of the battery pack 3. At the same time, the air supply scheme is selected in a targeted manner to avoid the problems of excessive air supply and uneven air supply.

[0038] Example 2

[0039] The structure and working mechanism of the criss-cross shunt and energy storage battery box of this embodiment are basically the same as those of embodiment 1, except that the criss-cross shunt of this embodiment is formed by stacking a total of 2 levels of horizontal shunt sections and a total of 3 levels of vertical shunt sections in a criss-cross manner; the criss-cross shunt is formed by stacking a first-level vertical shunt section, a first-level horizontal shunt section, a second-level vertical shunt section, a second-level horizontal shunt section, and a third-level vertical shunt section in a criss-cross manner from the environment side to the battery side. The first-level vertical shunt section of the criss-cross shunt is close to the environment side, while the third-level vertical shunt section is close to the battery side, and the horizontal shunt section is arranged between two adjacent vertical shunt sections. The first-level vertical diversion section includes only one vertical diversion section, the first-level horizontal diversion section consists of two horizontal diversion sections, the second-level vertical diversion section consists of four vertical diversion sections, the second-level horizontal diversion section consists of eight horizontal diversion sections, and the third-level vertical diversion section consists of 16 vertical diversion sections.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A crisscross type diverter, characterized in that: The criss-cross shunt type flow divider is formed by stacking a total of N levels of vertical shunt sections and a total of N+1 levels of horizontal shunt sections in a criss-cross manner, wherein N is a non-zero natural number; the first level of horizontal shunt sections of the criss-cross shunt type flow divider is close to the environment side, while the N+1th level of horizontal shunt sections is close to the battery side, and the vertical shunt sections are arranged between two adjacent horizontal shunt sections; Alternatively, the criss-cross type diverter is formed by stacking a total of N levels of horizontal diverter sections and a total of N+1 levels of vertical diverter sections in a criss-cross manner, wherein N is a non-zero natural number; the first level of vertical diverter sections of the criss-cross type diverter is close to the environment side, and the N+1 level of vertical diverter sections is close to the battery side, and the horizontal diverter sections are arranged between two adjacent vertical diverter sections; Among them, a partition is provided in the middle area of ​​the horizontal diversion section and the vertical diversion section, and the partition divides each horizontal diversion section and the vertical diversion section into two independent ventilation windows; the partition of the horizontal diversion section is arranged horizontally, while the partition of the vertical diversion section is arranged vertically.

2. The criss-cross type flow divider according to claim 1, characterized in that: When the first horizontal shunt section of the crisscross shunt is close to the environment side, and the N+1th horizontal shunt section is close to the battery side, the Nth vertical shunt section of the crisscross shunt is composed of 2 2N-1 The N+1st level horizontal flow divider consists of 2 2N The first-level horizontal diversion section only includes one horizontal diversion section.

3. The criss-cross type flow divider according to claim 1, characterized in that: When the first vertical shunt section of the criss-cross shunt is close to the environment side, and the N+1th vertical shunt section is close to the battery side, the Nth horizontal shunt section of the criss-cross shunt is composed of 2 2N-1 The N+1st level vertical flow divider consists of 2 2N The first-stage vertical diversion section only includes one vertical diversion section.

4. The criss-cross type flow divider according to claim 1, characterized in that: When N is 2, the criss-cross diverter is composed of a first-level horizontal diverter section, a first-level vertical diverter section, a second-level horizontal diverter section, a second-level vertical diverter section, and a third-level horizontal diverter section stacked crisscross along the environment side toward the battery side; the first-level horizontal diverter section is close to the environment side, and the third-level horizontal diverter section is close to the battery side; the first-level horizontal diverter section includes only one horizontal diverter section, the first-level vertical diverter section is composed of two vertical diverter sections, the second-level horizontal diverter section is composed of four horizontal diverter sections, and the second-level vertical diverter section is composed of eight vertical diverter sections. The third-level horizontal diversion section is composed of 16 horizontal diversion sections; each ventilation window of the first-level horizontal diversion section is independently connected to the two ventilation windows of the first-level vertical diversion section, each ventilation window of the first-level vertical diversion section is independently connected to the two ventilation windows of the second-level horizontal diversion section, each ventilation window of the second-level horizontal diversion section is independently connected to the two ventilation windows of the second-level vertical diversion section, and each ventilation window of the second-level vertical diversion section is independently connected to the two ventilation windows of the third-level horizontal diversion section.

5. The criss-cross type flow divider according to claim 1, characterized in that: The third-stage horizontal diversion section is arranged in a 4*4 array, and each row includes 8 ventilation windows.

6. An energy storage battery box, characterized in that: The energy storage battery box includes a box body that can accommodate energy storage batteries and at least one criss-cross shunt as described in any one of claims 1 to 5 arranged in the box body.

7. The energy storage battery box according to claim 6, characterized in that: The box body comprises an air inlet window and an air outlet window; a crisscross flow divider is arranged on the side of the box body close to the air inlet window.

8. The energy storage battery box according to claim 7, characterized in that: The air inlet window is arranged correspondingly to the two ventilation windows of the first-stage vertical diversion section or the first-stage horizontal diversion section and remains connected.

9. The energy storage battery box according to claim 6, characterized in that: The box body comprises an air inlet window and an air outlet window; a crisscross type flow divider is respectively arranged on the side of the box body close to the air inlet window and the side of the air outlet window.

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