Battery box body and battery system

Abstract

The utility model discloses a battery box and a battery system, and relates to the technical field of batteries. The battery box comprises a box body and a cover plate connected to the box body, the box body comprises a battery bin with an opening, one or more partition plates are arranged in the battery bin, and the battery bin is divided into a plurality of sub battery bins by the partition plates. The box body further comprises a bottom plate, the cover plate is arranged on the side, away from the opening of the battery bin, of the bottom plate, and the bottom plate and the cover plate form a first flow channel system. The partition plate is hollow, the inner space of the partition plate is a second flow channel system, and the first flow channel system communicates with the second flow channel system.

Description

Technical Field

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

[0002] Batteries are widely used in various fields as energy storage products. Currently, multiple cells are often connected in series or parallel and fixed in a box to form a battery pack. Due to the characteristics of energy storage products, batteries often generate heat during operation. This structural design causes the cells in the center of the battery pack to be surrounded, causing heat to accumulate and the temperature to rise.

[0003] In related technical solutions, a cooling system is generally designed at the bottom of the battery pack to enable heat exchange between the bottom of the battery cell and the cooling medium. The temperature of the battery pack is adjusted by controlling the temperature and flow of the cooling medium. However, the cooling effect is not obvious, and the heat of the middle battery cell cannot be dissipated in time, resulting in excessively high temperature, which seriously affects the performance of the battery pack. Utility Model Content

[0004] The embodiments of the present application provide a battery box and a battery system, which can improve the technical problem in the related art of poor heat dissipation inside the battery pack and the impact on battery performance.

[0005] In a first aspect, the present application provides a battery case, comprising a case body, the case body including a battery compartment having an opening, a partition disposed within the battery compartment, the partition dividing the battery compartment into multiple sub-battery compartments. The case body also includes a bottom plate, on which a first flow channel system is disposed. The partition is hollow, and the interior space of the partition constitutes a second flow channel system, and the first flow channel system is connected to the second flow channel system.

[0006] On this basis, by providing a battery compartment with an opening on the case body, the battery cells can be placed in the battery compartment to form a battery pack, and the battery cells in the battery compartment can be easily replaced. By providing a first flow channel system at the bottom of the case body, a first cooling system for the battery case is formed, and the battery cells in the battery compartment can be dissipated through the bottom plate of the case body, thereby dissipating heat for all the battery cells in the battery compartment. By providing a partition in the battery compartment and providing a second flow channel system inside the partition, a second cooling system for the battery case is formed, and the battery cells near the partition in the battery compartment can be dissipated through the partition, thereby dissipating heat for the battery cells in the middle position in the battery compartment. Moreover, the contact area between the partition and the battery cells is generally larger than the contact area between the bottom plate and the battery cells, which can achieve a better heat dissipation effect. This avoids the accumulation of heat in the middle battery cells after too many battery cells are stacked in the battery compartment, affecting the working performance of the battery pack.

[0007] In a possible design of the first aspect, the battery box further includes a cover plate connected to the box body, wherein the cover plate is arranged on a side of the bottom plate away from the battery compartment opening, and the bottom plate and the cover plate form a first flow channel system.

[0008] Based on this, this design approach provides a specific configuration for the first flow channel system, namely, forming the first flow channel system through a base plate and a cover plate. For example, a groove can be provided on the base plate, and then covered with a cover plate. The space within the groove can be used as the first flow channel system. Another example is that the base plate and cover plate are kept at a certain distance, and an annular side plate is placed between the base plate and the cover plate. The enclosed space formed by the base plate, cover plate, and annular side plate can also serve as the first flow channel system.

[0009] In one possible design of the first aspect, the housing further includes a liquid inlet and a liquid outlet, and a first diverter plate is disposed on the bottom plate. The first diverter plate divides the first flow channel system into a first flow area and a second flow area, and the first flow area and the second flow area are connected. The liquid inlet is connected to the first flow area, and the liquid outlet is connected to the second flow area.

[0010] On this basis, by providing a first diverter plate, the first flow channel system is divided into a first flow area and a second flow area. This is to improve the flow path of the coolant in the first flow channel system, so that the coolant has a longer contact time with the base plate, and as much heat generated by the battery cells as possible is removed through the base plate, achieving a better heat dissipation effect. Of course, in this application, more first diverter plates can also be provided to extend the flow path of the coolant in the first flow channel system, further improving the cooling effect.

[0011] In a possible design of the first aspect, a second diverter plate is provided in the partition, and the second diverter plate divides the second flow channel system into a third flow area and a fourth flow area. The third flow area is connected to the first flow area, the fourth flow area is connected to the second flow area, and the third flow area is connected to the fourth flow area.

[0012] On this basis, by providing a second diverter plate, the second flow channel system is divided into a third flow zone and a fourth flow zone. This is to improve the flow path of the coolant in the second flow channel system, so that the coolant has a longer contact time with the partition, and as much heat generated by the battery cells in the middle position as possible is removed through the partition, thereby achieving a better heat dissipation effect. Of course, more second diverter plates can also be provided in this application to extend the flow path of the coolant in the second flow channel system and further improve the cooling effect.

[0013] In a possible design of the first aspect, a first guide plate is provided on the bottom plate, extending from the first flow area to the second flow area. A second guide plate is provided in the partition plate, extending from the third flow area to the fourth flow area.

[0014] On this basis, the first guide plate and the second guide plate are set to make the coolant flow more smoothly in the first flow channel system and the second flow channel system, reduce the flow resistance of the coolant in the first flow channel system and the second flow channel system, and improve the flow capacity of the coolant in the flow channel system.

[0015] In a possible design of the first aspect, the first guide plate and the second guide plate are both U-shaped.

[0016] On this basis, by configuring both the first and second guide plates to be U-shaped, the turns of the first and second guide plates are smoother, allowing the coolant to flow more smoothly along the first and second guide plates, thereby reducing its flow resistance. Of course, the first and second guide plates can also be configured as other shapes, such as various arcs, as long as the shape is configured to reduce the flow resistance of the coolant.

[0017] In a possible design of the first aspect, a plurality of spoiler columns are provided on the bottom plate and in the partition plate.

[0018] On this basis, by arranging multiple spoiler columns on the bottom plate and the partition, the coolant forms turbulence when flowing in the first flow channel system and the second flow channel system. The coolant flowing in the form of turbulence has instability and randomness, so that the coolant can better contact the partition and the bottom plate of the box body during flow, increasing the friction between the coolant and the bottom plate and the partition, and improving the cooling effect.

[0019] In a possible design of the first aspect, the spoiler column is cylindrical or hemispherical. This design shows a specific arrangement of the spoiler column.

[0020] In a possible design of the first aspect, two partitions are provided in the battery compartment, and the two partitions are spaced apart. This design shows the specific number of partitions provided in the battery compartment. Of course, a larger number of partitions can also be provided according to cooling needs.

[0021] In a possible design of the first aspect, the partition is integrally formed with the box body.

[0022] On this basis, the partition is integrally formed with the box body, which can improve the sealing of the first flow channel system and the second flow channel system and prevent the coolant from penetrating into the battery compartment.

[0023] In a second aspect, the present application provides a battery system, which includes battery cells and a battery box of the first aspect and any possible design thereof, wherein the battery cells are arranged in each sub-battery compartment of the battery box.

[0024] It can be understood that the beneficial effects that can be achieved by the battery system described in the second aspect provided above can refer to the beneficial effects in the first aspect and any possible design method thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the front structure of a battery box provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the back structure of a battery box provided in an embodiment of the present application;

[0028] Figure 3 A schematic structural diagram of a bottom plate in a battery box provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the internal structure of a separator in a battery box provided in an embodiment of the present application;

[0030] Figure 5 A schematic structural diagram of a battery system provided in an embodiment of the present application.

[0031] In the figure: 100 - battery box; 110 - box body; 120 - cover plate; 130 - partition plate; 140 - liquid inlet pipe; 150 - liquid outlet pipe; 160 - spoiler column; 170 - battery cell;

[0032] 111 - battery compartment; 112 - bottom plate; 113 - first manifold; 114 - first flow channel system; 115 - first flow area; 116 - second flow area; 117 - liquid inlet; 118 - liquid outlet; 119 - first guide plate;

[0033] 131 - second diverter plate; 132 - second flow channel system; 133 - third flow area; 134 - fourth flow area; 135 - second guide plate. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0035] Batteries are widely used as energy storage products in various fields. Existing technical solutions often employ multiple battery cells connected in series or parallel and secured within a battery case to form a battery pack. Batteries typically generate heat during operation. Because a battery pack contains multiple cells, the central cell is surrounded. When the battery pack is operating, the heat generated by the central cell accumulates, causing the temperature to rise. Failure to effectively dissipate heat from the central cell, resulting in excessively high temperatures, can impact the battery pack's performance and, in severe cases, even create safety hazards.

[0036] In order to solve the problem that the heat of the middle battery cell cannot be dissipated in time during the operation of the battery pack, an embodiment of the present application provides a battery box.

[0037] refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the front structure of a battery box provided in an embodiment of the present application. Figure 2 A schematic diagram of the back structure of a battery box provided in an embodiment of the present application.

[0038] like Figure 1 and Figure 2 As shown, the battery case 100 provided in the embodiment of the present application includes a case body 110 , and a first flow channel system 114 is provided on a bottom plate 112 of the case body 110 . The first flow channel system 114 can be used as a cooling system for the case body 110 .

[0039] The first flow channel system 114 may be disposed inside the bottom plate 112. For example, the bottom plate 112 may be hollow to form the first flow channel system 114. Alternatively, the bottom plate 112 may be combined with other structures to form the first flow channel system 114.

[0040] In the embodiments of this application, Figure 2As shown, the battery case 100 further includes a cover plate 120, which is arranged on a side of the bottom plate 112 away from the opening of the battery compartment 111, and the cover plate 120 is connected to the bottom plate 112 of the case body 110. The bottom plate 112 of the case body 110 and the cover plate 120 form a first flow channel system 114. For example, a groove is provided on the bottom plate 112 of the case body 110, and the size of the cover plate 120 matches the size of the groove on the bottom plate 112. In addition, the size of the cover plate 120 can also be set to match the size of the bottom plate 112, or the size of the cover plate 120 can be larger than the size of the bottom plate 112. When the cover plate 120 is covered on the bottom plate 112 of the case body 110, the cover plate 120 and the groove on the bottom plate 112 form a closed space, and the closed space is the first flow channel system 114. Since the first flow channel system 114 is in contact with the bottom plate 112 of the box body 110 , adding coolant into the first flow channel system 114 can dissipate heat and cool down the batteries in the box body 110 .

[0041] It should be noted that the formation of the first flow channel system 114 is not limited to the above-described arrangement. For example, a certain gap may be maintained between the cover plate 120 and the bottom plate 112, and an annular side plate may be provided between the cover plate 120 and the bottom plate 112. The enclosed space formed by the cover plate 120, the bottom plate 112, and the annular side plate may also constitute the first flow channel system 114.

[0042] like Figure 1 As shown, the box body 110 includes a battery compartment 111 with an opening, and one or more partitions 130 may be provided in the battery compartment 111, and the partitions 130 divide the battery compartment 111 into multiple sub-battery compartments. Specifically, the box body 110 may be composed of side panels and a bottom panel 112, and four side panels and one bottom panel 112 may be combined to form a box body 110 with a top opening, and the space enclosed by the side panels and the bottom panel 112 is the battery compartment 111. The battery compartment 111 is mainly used to store battery cells, and multiple battery cells can be stored in the battery compartment 111. When the partitions 130 are provided in the battery compartment 111, the battery compartment 111 is divided into multiple sub-battery compartments by the partitions 130, and each sub-battery compartment can also store one or more battery cells. The number of battery cells stored in the sub-battery compartment is related to the size of the sub-battery compartment and the size of the battery cells.

[0043] In this embodiment of the present application, the structure of the battery case 100 is described using a partition 130 disposed within the battery compartment 111 as an example. The partition 130 divides the battery compartment 111 into two sub-compartments. The partition 130 can be positioned in the middle of the battery compartment 111, dividing the battery compartment 111 into two equally sized sub-compartments. Multiple battery cells can be installed in each sub-compartment, and by connecting the multiple cells in series or in parallel, a battery pack can be formed to power electrical components.

[0044] Of course, the partition 130 can also be positioned away from the center of the battery compartment 111. For example, the partition 130 can be positioned offset from the center, dividing the battery compartment 111 into two sub-battery compartments of different sizes. The present embodiment does not limit the specific location of the partition 130, and those skilled in the art can arrange it according to actual needs. The present embodiment uses the partition 130 positioned in the center of the battery compartment 111 as an example to illustrate the relevant flow channel system configuration.

[0045] The following details the structural arrangement of the box body 110 and the structural arrangement of the partition 130. Figure 3 , Figure 3 This is a schematic diagram of the structure of the bottom plate 112 of a battery box provided in an embodiment of the present application. Figure 3 As shown, a groove is provided on the bottom plate 112 of the box body 110, and the groove cooperates with the cover plate 120 to form a first flow channel system 114. A first diverter plate 113 is provided on the bottom plate 112 of the box body 110. The first diverter plate 113 divides the first flow channel system 114 into a first flow area 115 and a second flow area 116. The height of the first diverter plate 113 can be set to be equal to the height of the first flow channel system 114, so as to achieve isolation between the first flow area 115 and the second flow area 116 in the height direction of the first diverter plate 113. Among them, the first end of the first flow area 115 ( Figure 3 The left end of the middle) and the first end of the second flow region 116 ( Figure 3 The left end of the first flow region 115 is isolated by the first diverter plate 113, and the second end of the first flow region 115 ( Figure 3 the right end in the middle) and the second end of the second flow region 116 ( Figure 3 The right end of the figure is connected to each other. That is, it can be understood that Figure 3 As shown, first manifold plate 113 is connected to the left side of the groove on base plate 112, but not to the right side of the groove. The height of first manifold plate 113 is the same as the height of the groove. When cover plate 120 is attached to base plate 112, first manifold plate 113 divides first flow channel system 114 into two interconnected flow areas (first flow area 115 and second flow area 116).

[0046] like Figure 3 As shown, the housing body 110 is further provided with a liquid inlet 117 and a liquid outlet 118. The liquid inlet 117 is in communication with the first flow area 115, and the liquid outlet 118 is in communication with the second flow area 116. When providing the liquid inlet 117 and the liquid outlet 118, the liquid inlet 117 can be positioned at the first end of the first flow area 115, and the liquid outlet 118 can be positioned at the first end of the second flow area 116. The coolant flowing in through the liquid inlet 117 flows from the first end of the first flow area 115 to the second end of the first flow area 115, then from the second end of the first flow area 115 to the second end of the second flow area 116, and then from the second end of the second flow area 116 to the first end of the second flow area 116. The coolant flowing out of the liquid inlet 117 can flow through the entire first flow area 115 and the second flow area 116 and then flow out of the liquid outlet 118 so as to flow through the entire first flow channel system 114 to achieve a better heat dissipation effect.

[0047] Of course, in order to facilitate the filling and draining of the coolant, a liquid inlet pipe 140 and a liquid outlet pipe 150 can be provided on the box body 110. The liquid inlet pipe 140 is communicated with the liquid inlet 117, and the liquid outlet pipe 150 is communicated with the liquid outlet 118.

[0048] In the embodiment of the present application, since the first flow channel system 114 is divided into a first flow area 115 and a second flow area 116 by the first diverter plate 113, the liquid inlet 117 is connected to the first flow area 115, and the liquid outlet 118 is connected to the second flow area 116, the first flow area 115 can be referred to as the liquid inlet area, and the second flow area 116 can be referred to as the liquid outlet area. The second flow channel system 132 is connected to the first flow channel system 114 and is divided into a third flow area 133 and a fourth flow area 134 by the second diverter plate 131. When the second flow channel system 132 is connected to the first flow channel system 114, the third flow area 133 can be connected to the first flow area 115, and the fourth flow area 134 can be connected to the second flow area 116. Specifically, the first end of the third flow area 133 is connected to the first flow area 115, and the first end of the fourth flow area 134 is connected to the second flow area 116.

[0049] When the battery cells in the box need to be cooled, coolant can be injected from the liquid inlet pipe 140 of the box body 110. Since the liquid inlet 117 is set at the first end of the first flow area 115, the coolant entering from the liquid inlet 117 can flow from the first end of the first flow area 115 to the second end of the first flow area 115 after entering the first flow area 115. The second end of the first flow area 115 is connected to the second end of the second flow area 116, so the coolant can flow from the second end of the first flow area 115 to the second end of the second flow area 116, and from the second end of the second flow area 116 to the first end of the second flow area 116, so that the coolant can flow through the entire first flow channel system 114. The liquid outlet 118 is set at the first end of the second flow area 116, and the coolant that has flowed through the entire first flow channel system 114 can flow out from the liquid outlet 118. When the coolant flows through the first flow channel system 114 , it can contact the bottom plate 112 of the box body 110 , and thus can indirectly contact the battery cells through the bottom plate 112 of the box body 110 , transfer heat through the bottom plate 112 , and take away the heat generated by the battery cells.

[0050] In the embodiment of the present application, the internal structure of the partition 130 can be referred to Figure 4 , Figure 4 This is a schematic diagram of the internal structure of a partition 130 in a battery box provided in an embodiment of the present application. Figure 4 is a cross-sectional view of the partition 130, specifically Figure 3 Cross-sectional view in the AA direction.

[0051] like Figure 4 As shown, the interior of the partition 130 is a hollow structure, and the space within the hollow portion of the partition 130 forms a second flow channel system 132. A second diverter plate 131 is disposed within the partition 130, which divides the second flow channel system 132 into two interconnected third flow areas 133 and fourth flow areas 134. The first end of the third flow area 133 and the first end of the fourth flow area 134 are isolated by the second diverter plate 131, while the second end of the third flow area 133 and the second end of the fourth flow area 134 are connected. The first end of the third flow area 133 and the first end of the fourth flow area 134 are both connected to the first flow channel system 114, meaning that the ends of the third flow area 133 and the fourth flow area 134 that are isolated from each other are connected to the first flow channel system 114. This arrangement facilitates the coolant in the first flow channel system 114 to enter the third flow area 133 from the first end of the third flow area 133, and enter the fourth flow area 134 from the second end of the third flow area 133, and then flow out from the first end of the fourth flow area 134 to the first flow channel system 114, so that the coolant can flow through the entire second flow channel system 132.

[0052] In an embodiment of the present application, when it is necessary to cool the battery cells in the battery compartment 111, coolant can be added to the first flow channel system 114. Since the first flow channel system 114 is in contact with the bottom plate 112 of the battery compartment 111, the coolant in the first flow channel system 114 can achieve heat transfer by contacting the bottom plate 112, and remove the heat generated by the battery cells from the bottom of the battery cells. Since the second flow channel system 132 is connected to the first flow channel system 114, the coolant in the first flow channel system 114 can enter the second flow channel system 132, and the coolant in the second flow channel system 132 can remove the heat of the battery cells in contact with the partition 130.

[0053] When multiple battery cells are placed in the battery compartment 111, the heat generated by the centrally located battery cell is difficult to dissipate promptly, leading to heat accumulation and a high battery temperature. Because the partition 130 is positioned in the middle of the battery compartment 111, the centrally located battery cell contacts the partition 130, and the sides of the battery cell also contact the partition 130, resulting in a large contact area. Therefore, when the coolant flows through the second flow channel system 132 in the partition 130, it can remove a significant amount of heat, preventing the heat generated by the centrally located battery cell from being dissipated promptly.

[0054] In the embodiment of the present application, since the second flow channel system 132 is connected to the first flow channel system 114, specifically, the first end of the third flow area 133 is connected to the first flow area 115, the second end of the third flow area 133 is connected to the second end of the fourth flow area 134, and the first end of the fourth flow area 134 is connected to the second flow area 116. Therefore, the coolant in the first flow area 115 can also enter the second flow channel system 132 through the first end of the third flow area 133. After entering the first flow channel system 114, the coolant flows from the first end of the third flow area 133 to the second end of the third flow area 133, then from the second end of the third flow area 133 to the second end of the fourth flow area 134, and then from the second end of the fourth flow area 134 to the first end of the fourth flow area 134, thereby flowing throughout the entire second flow channel system 132. Since the first end of the fourth flow area 134 is connected to the second flow area 116 of the first flow channel system 114, the coolant flowing through the second flow channel system 132 can flow from the first end of the fourth flow area 134 into the second flow area 116, merge with the coolant in the second flow area 116, and flow out from the liquid outlet 118 in the second flow area 116.

[0055] Since the partition 130 is in contact with the battery cells in the middle of the battery compartment 111, when the coolant flows through the second flow channel system 132 of the partition 130, the coolant can indirectly contact the battery cells in the middle of the battery compartment 111 through the partition 130, taking away the heat generated by the battery cells in contact with the partition 130, and taking away the heat generated by the battery cells near the partition 130, thereby cooling the battery cells in the middle of the battery compartment 111 and avoiding heat accumulation in the middle battery cells, which affects the performance of the battery.

[0056] In the embodiment of the present application, when setting the liquid inlet 117 and the liquid outlet 118, the liquid inlet 117 and the liquid outlet 118 can be set on the same side of the box body, so that the coolant can enter and exit from the same side of the box body and flow through the entire first flow channel system 114. Of course, the liquid inlet 117 and the liquid outlet 118 can also be set at different positions of the box body. The setting principle of the liquid inlet 117 and the liquid outlet 118 can be followed: after the coolant enters the first flow channel system 114 from the liquid inlet 117, it can flow through the entire first flow channel system 114, and make the flow path of the coolant in the first flow channel system 114 as long as possible, and then flow out from the liquid outlet 118. This setting allows the coolant to flow through a larger surface area in the first flow channel system 114 to better dissipate heat for the battery cells in the battery compartment 111. In the embodiment of the present application, the liquid inlet 117 and the liquid outlet 118 are arranged on the same side of the housing, which facilitates the arrangement of the liquid inlet pipe 140 and the liquid outlet pipe 150 on the same side of the housing, thereby facilitating the addition and removal of coolant from the housing. The liquid inlet pipe 140 and the liquid outlet pipe 150 can be arranged on the same side of the housing to facilitate the addition and removal of coolant.

[0057] In one embodiment of the present application, Figure 3 As shown, a first guide plate 119 is also provided on the bottom plate 112, extending from the first flow area 115 to the second flow area 116. That is, the first guide plate 119 is provided in the area of ​​the first flow channel system 114 not separated by the first diverter plate 113. The first guide plate 119 is primarily used to guide the coolant in the first flow channel system 114, allowing the coolant to flow smoothly from the first flow area 115 to the second flow area 116, thereby reducing the resistance to the coolant flowing at the intersection of the first flow area 115 and the second flow area 116.

[0058] In order to achieve a better flow-guiding effect, in an embodiment of the present application, the side plate at the second end of the first flow area 115 can be set to an arc shape. Similarly, the side plate at the second end of the second flow area 116 can also be set to an arc shape. That is, the connection between the first flow area 115 and the second flow area 116 is set to be relatively smooth. This is because the coolant enters the second flow area 116 from the first flow area 115, which is the position where the coolant turns in the first flow system. For example, the shape formed by the side plate at the second end of the first flow area 115 and the side plate at the second end of the second flow area 116 can be set to be U-shaped. Such a shape setting can make the coolant flow smoothly from the first flow area 115 to the second flow area 116, reducing the resistance to the flow of the coolant.

[0059] The first guide plate 119 is provided to achieve a better flow-guiding effect. Therefore, in this embodiment of the present application, the first guide plate 119 can also be configured as an arc. One end of the first guide plate 119 is located within the first flow area 115, and the other end is located within the second flow area 116. The curvature of the guide plate aligns with the flow direction of the coolant from the first flow area 115 to the second flow area 116.

[0060] In one embodiment of the present application, Figure 4 As shown, a second guide plate 135 is further disposed within the partition 130. The second guide plate 135 extends from the third flow area 133 to the fourth flow area 134. That is, the second guide plate 135 is disposed in an area of ​​the second flow channel system 132 that is not separated by the second diverter plate 131. The second guide plate 135 is primarily used to guide the coolant in the second flow channel system 132, allowing the coolant to flow smoothly from the third flow area 133 to the fourth flow area 134, thereby reducing the resistance to the coolant flowing at the intersection of the third flow area 133 and the fourth flow area 134.

[0061] In order to achieve a better flow-guiding effect, in an embodiment of the present application, the side plate at the second end of the third flow area 133 can be set to an arc shape. Similarly, the side plate at the second end of the fourth flow area 134 can also be set to an arc shape. That is, the connection between the third flow area 133 and the fourth flow area 134 is set to be relatively smooth. This is because the coolant enters the fourth flow area 134 from the third flow area 133, which is also the location where the coolant turns in the second flow system. For example, the shape formed by the side plate at the second end of the third flow area 133 and the side plate at the second end of the fourth flow area 134 can be set to be U-shaped. Such a shape setting can make the coolant flow smoothly from the third flow area 133 to the fourth flow area 134, reducing the resistance to the flow of the coolant.

[0062] The second guide plate 135 is provided to achieve a better flow-guiding effect. Therefore, in this embodiment of the present application, the second guide plate 135 can also be configured as an arc. One end of the second guide plate 135 is located within the first flow area 115, and the other end is located within the second flow area 116. The curvature of the guide plate aligns with the flow direction of the coolant from the third flow area 133 to the fourth flow area 134.

[0063] In one embodiment of the present application, the first guide plate 119 and the second guide plate 135 are both configured to be arc-shaped, wherein the first guide plate 119 and the second guide plate 135 can be configured to be semicircular, U-shaped, crescent-shaped or other arc-shaped shapes that can achieve a smooth transition. Figure 3 and Figure 4 As shown, the first guide plate 119 and the second guide plate 135 in the embodiment of the present application are arranged in a U-shape. The first diverter plate 113 extends into the first guide plate 119, dividing the first guide plate 119 into two parts, one of which is located in the first flow area 115 and the other in the second flow area 116. The second diverter plate 131 extends into the second guide plate 135, dividing the second guide plate 135 into two parts, one of which is located in the third flow area 133 and the other in the fourth flow area 134.

[0064] In the embodiment of the present application, the battery cells in the box are cooled mainly by allowing the coolant to flow through the first flow channel system 114 and the second flow channel system 132. In order to enable the coolant to have a better cooling effect when flowing through the first flow channel system 114 and the second flow channel system 132, spoiler columns 160 are provided in the first flow channel system 114 and the second flow channel system 132.

[0065] Specifically, a plurality of spoiler columns 160 are disposed at the bottom of the first flow channel system 114. That is, a plurality of spoiler columns 160 are disposed on the bottom plate 112 of the housing body 110, and the plurality of spoiler columns 160 are located within the first flow channel system 114. When the coolant flows through the first flow channel system 114, the spoiler columns 160 within the first flow channel system 114 cause the coolant to form turbulent flow during the flow process. The coolant flowing in this turbulent form has instability and randomness, which enables the coolant to better contact the surface of the object being cooled (the bottom plate 112 of the housing body 110) during flow, thereby increasing the friction between the coolant in the first flow channel system 114 and the bottom plate 112, thereby improving the cooling effect.

[0066] In addition, a plurality of spoiler columns 160 are also disposed within the partition 130, that is, a plurality of spoiler columns 160 are disposed within the second flow channel system 132. The spoiler columns 160 can be disposed at the top or bottom of the second flow channel system 132. When the coolant flows through the second flow channel system 132, the spoiler columns 160 within the second flow channel system 132 cause the coolant to form turbulent flow during the flow process. The coolant flowing in the form of turbulence has instability and randomness, which enables the coolant in the second flow channel system 132 to better contact the partition 130 during flow, increasing the friction between the coolant in the second flow channel system 132 and the partition 130, thereby improving the cooling effect.

[0067] It should be noted that the spoiler posts 160 in the first flow channel system 114 and the spoiler posts 160 in the second flow channel system 132 can be configured to have the same shape or different shapes. For example, the spoiler posts 160 in the first flow channel system 114 and the spoiler posts 160 in the second flow channel system 132 can both be configured to have a cylindrical shape, a hemispherical shape, a rectangular parallelepiped, or any other arbitrary shape. Alternatively, the spoiler posts 160 in the first flow channel system 114 can be configured to have a cylindrical shape or other shape, while the spoiler posts 160 in the second flow channel system 132 can be configured to have a hemispherical shape or other shape, so that the shapes of the spoiler posts 160 in the two flow channel systems remain inconsistent.

[0068] In one embodiment of the present application, a plurality of partitions 130 are provided in the box body, and the plurality of partitions 130 are all provided in the battery compartment 111. The plurality of partitions 130 divide the battery compartment 111 into a plurality of sub-battery compartments. For example, two partitions 130 are provided in the battery compartment 111, and the two partitions 130 are arranged at intervals to divide the battery compartment 111 into three sub-battery compartments. Since battery cells are generally rectangular, when setting up the box body, the positional relationship between the side panels of the box body can be set so that the two adjacent side panels remain perpendicular, so that the battery compartment 111 surrounded by the side panels and the bottom panel 112 is rectangular, which facilitates the placement of battery cells in the battery compartment 111. When a plurality of partitions 130 are provided in the battery compartment 111, the partitions 130 can be arranged parallel to two of the side panels of the box body and perpendicular to the other two side panels of the box body, so that the sub-battery compartments divided by the partitions 130 are also rectangular, which facilitates the placement of battery cells.

[0069] The partition 130 and the box body 110 can be two separate components, and can be fixedly connected to the box body 110 by gluing or other connection methods. Of course, the partition 130 and the box body 110 can also be integrally formed. Integral molding can improve the sealing between the box body 110 and the partition 130, and can prevent the coolant from leaking from the connection between the partition 130 and the box body 110.

[0070] In one embodiment of the present application, a battery system is also provided. Figure 5 , Figure 5 This is a schematic diagram of the structure of a battery system provided in an embodiment of the present application. Figure 5 As shown, the battery system includes a battery cell 170 and a battery box 100 described in any of the above embodiments. The battery cell 170 is disposed in a sub-battery compartment of the battery box 100, and each sub-battery compartment includes one or more battery cells 170.

[0071] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery box, characterized in that: The box body includes a battery compartment with an opening, wherein a partition is provided in the battery compartment, and the partition divides the battery compartment into a plurality of sub-battery compartments; The box body further comprises a bottom plate, on which a first flow channel system is provided; The interior of the partition is hollow, and the interior space of the partition is a second flow channel system, and the first flow channel system is connected to the second flow channel system; A first diverter plate is provided on the bottom plate, the first diverter plate divides the first flow channel system into a first flow area and a second flow area, the first flow area and the second flow area are connected; The box body further includes a liquid inlet and a liquid outlet, the liquid inlet is arranged at a first end of the first flow area and communicates with the first flow area, the liquid outlet is arranged at a first end of the second flow area and communicates with the second flow area, and the second end of the first flow area is communicated with the second end of the second flow area; A second diverter plate is provided in the partition, and the second diverter plate divides the second flow channel system into a third flow area and a fourth flow area. The third flow area is connected to the first flow area, the fourth flow area is connected to the second flow area, and the third flow area is connected to the fourth flow area.

2. The battery box according to claim 1, characterized in that: It also includes a cover plate connected to the box body, the cover plate is arranged on a side of the bottom plate away from the battery compartment opening, and the bottom plate and the cover plate form the first flow channel system.

3. The battery box according to claim 2, characterized in that: A first guide plate is provided on the bottom plate, and the first guide plate extends from the first flow area to the second flow area; A second guide plate is provided in the partition plate, and the second guide plate extends from the third flow area to the fourth flow area.

4. The battery box according to claim 3, characterized in that: The first guide plate and the second guide plate are both U-shaped.

5. The battery case according to any one of claims 1 to 4, characterized in that: A plurality of spoiler columns are provided in both the first flow channel system and the second flow channel system.

6. The battery box according to claim 5, characterized in that: The spoiler column is cylindrical or hemispherical.

7. The battery case according to any one of claims 1 to 4, characterized in that: Two partitions are arranged in the battery compartment, and the two partitions are arranged at intervals.

8. The battery case according to any one of claims 1 to 4, characterized in that: The partition plate and the box body are integrally formed.

9. A battery system, characterized in that: The battery system includes a battery cell and a battery box according to any one of claims 1 to 8, and the battery cell is arranged in each of the sub-battery compartments.

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