Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack, and relates to the technical field of battery manufacturing. The battery box body comprises a bottom plate and a side plate, and the side plate and the bottom plate are connected and jointly define a containing cavity. And the side plate is provided with a liquid discharge hole. The end, close to the bottom plate, of the side plate extends towards the interior of the containing cavity to be provided with a protruding part, and a flow guide hole is formed in the protruding part. The flow guide hole is communicated with the liquid discharge hole. According to the battery box body, under the condition that condensed water is formed on the inner walls of the side plates, the condensed water can slide to the flow guide holes along the side walls and is discharged from the liquid discharge holes, so that the influence of the condensed water on the battery module can be reduced, the condensed water is prevented from being in contact with the battery module, and the safety of the battery module is improved.

Description

Technical Field

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

[0002] The frame of the battery box is usually made of metal alloy with good thermal conductivity, and its temperature is easily affected by the ambient temperature. When the electric vehicle is in a low-temperature environment, if the battery pack is charged or discharged or the battery system starts the heating module, the air temperature inside the battery pack will rise; while the box frame of the battery pack is affected by the external environment and has a lower temperature. When the air with a higher internal temperature contacts the wall of the box with a lower temperature, condensation is likely to occur. If there is a lot of condensation on the wall of the box and it flows in strands to the bottom of the battery pack, it may trigger an insulation failure of the battery pack, affecting safety. Utility Model Content

[0003] The utility model aims to provide a battery box and a battery pack, which can prevent condensation on the box wall from contacting the battery module and causing insulation failure, can smoothly discharge condensed water, and improve the safety of the battery pack.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In a first aspect, the utility model provides a battery box, comprising:

[0006] Base plate;

[0007] A side plate, the side plate is connected to the bottom plate and the two together form a receiving cavity; the side plate is provided with a drainage hole;

[0008] One end of the side plate close to the bottom plate is provided with a protrusion extending into the accommodating cavity, and the protrusion is provided with a guide hole;

[0009] The flow guide hole is communicated with the liquid discharge hole.

[0010] In an optional embodiment, the protrusion includes an end surface away from the side plate and an upper surface away from the bottom plate, and the end surface and the upper surface are connected at an angle; the upper surface is provided with a plurality of the guide holes arranged at intervals.

[0011] In an optional embodiment, the upper surface is a plane, and the upper surface forms an angle with the wall surface of the side plate facing the accommodating cavity, and the angle is greater than 0 degree and less than or equal to 90 degrees.

[0012] In an optional embodiment, the upper surface is provided with a recessed portion, and the guide hole is opened in the recessed portion.

[0013] In an optional embodiment, the cross-section of the recessed portion is U-shaped or arc-shaped.

[0014] In an optional embodiment, the side plate is a hollow structure, comprising a first wall body and a second wall body arranged opposite to each other, the protrusion is connected to the first wall body, and the second wall body is provided with the drainage hole;

[0015] A chamber is formed between the first wall body and the second wall body, and the chamber is used to connect the drainage hole and the guide hole.

[0016] In an optional embodiment, a cold plate is further included, wherein the cold plate is connected to the bottom plate, and the side plate is connected to a side of the cold plate away from the bottom plate.

[0017] In an optional embodiment, a liquid inlet pipe and a liquid outlet pipe are further included, the cold plate is provided with an inlet and an outlet, the inlet is connected to the liquid inlet pipe, the outlet is connected to the liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe penetrate the side plate and extend outside the accommodating cavity.

[0018] In an optional embodiment, a drain valve is provided in the drain hole.

[0019] In a second aspect, the utility model provides a battery pack, comprising a battery module and a battery case as described in any one of the aforementioned embodiments, wherein the battery module is disposed in the accommodating cavity.

[0020] The beneficial effects of the embodiments of the utility model include:

[0021] The battery box proposed by the utility model has a protrusion at the bottom of the side panel, and a guide hole is opened on the protrusion. If condensed water is formed on the inner wall of the side panel, the condensed water can slide along the side panel to the protrusion and be discharged out of the box through the guide hole. This can prevent the condensed water from contacting the battery module, avoid insulation failure of the battery pack, and improve safety.

[0022] The battery pack provided by the utility model includes the above-mentioned battery box, which can smoothly discharge condensed water, reduce the influence of condensed water on the battery module, and improve the safety of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the application scenario structure of the battery box provided by the embodiment of the utility model;

[0025] Figure 2 A schematic cross-sectional structure diagram of an application scenario of a battery box provided by an embodiment of the utility model;

[0026] Figure 3 A structural schematic diagram of a first structure of a side panel provided in an embodiment of the utility model;

[0027] Figure 4 A structural schematic diagram of a second structure of a side panel provided by an embodiment of the utility model from a first viewing angle;

[0028] Figure 5 A structural schematic diagram of a second structure of a side panel provided by an embodiment of the utility model from a second viewing angle;

[0029] Figure 6 for Figure 5 A local enlarged schematic diagram of the H in the middle;

[0030] Figure 7 A structural schematic diagram of a second structure of a side panel provided by an embodiment of the utility model from a third viewing angle;

[0031] Figure 8 A structural schematic diagram of a second structure of a side panel provided by an embodiment of the utility model from a fourth perspective;

[0032] Fig. 9 A schematic structural diagram of a third structure of a side panel provided in an embodiment of the utility model;

[0033] Fig.10 A schematic structural diagram of a fourth structure of a side panel provided in an embodiment of the utility model;

[0034] Fig.11 A schematic diagram of the structure of a cold plate provided in an embodiment of the utility model;

[0035] Fig.12 A schematic diagram of the overall structure of a battery pack provided by an embodiment of the utility model;

[0036] Fig.13 A schematic diagram of the disassembled structure of a battery pack provided in an embodiment of the utility model.

[0037] Icons: 100-battery case; 101-accommodating cavity; 110-bottom plate; 120-side plate; 130-protrusion; 131-end face; 132-upper surface; 133-flow guide hole; 135-recessed portion; 121-drain hole; 123-drain valve; 125-chamber; 141-first wall; 143-second wall; 145-reinforcement rib; 147-bottom wall; 149-top wall; 150-cold plate; 151-flow channel; 152-inlet; 153-outlet; 154-liquid inlet pipe; 155-liquid outlet pipe; 200-battery pack; 210-battery module; 220-top cover; 230-connecting row; 240-insulating plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The present embodiment provides a battery case 100 and a battery pack 200. If condensed water is formed on the inner wall of the side panel 120, the condensed water can slide along the side wall to the guide hole 133 and be discharged from the drainage hole 121, thereby reducing the impact of the condensed water on the battery module 210, avoiding contact between the condensed water and the battery module 210, and improving the safety of the battery module 210.

[0045] Please refer to Figure 1 and Figure 2 The present embodiment provides a battery case 100, including a bottom plate 110 and a side plate 120, the side plate 120 and the bottom plate 110 are connected, and the two together form a receiving cavity 101. The side plate 120 is provided with a drainage hole 121. One end of the side plate 120 close to the bottom plate 110 is provided with a protrusion 130 extending into the receiving cavity 101, and the protrusion 130 is provided with a guide hole 133. The guide hole 133 is connected with the drainage hole 121. In the battery case 100, if condensed water is formed on the inner wall of the side plate 120, the condensed water can slide along the side wall to the guide hole 133 and be discharged from the drainage hole 121, which can reduce the influence of the condensed water on the battery module 210, avoid the contact between the condensed water and the battery module 210, and improve the safety of the battery module 210.

[0046] Optionally, combined Figures 3 to 8 The protrusion 130 includes an end surface 131 away from the side plate 120 and an upper surface 132 away from the bottom plate 110, and the end surface 131 and the upper surface 132 are connected at an angle; the upper surface 132 is provided with a plurality of guide holes 133 arranged at intervals, which are used to drain the condensed water sliding down the inner wall of the side plate 120.

[0047] Optionally, the upper surface 132 is a plane, and the plane is horizontally or inclined. Figure 3 Schematic diagram showing the upper surface 132 in a horizontal state, Figure 4A schematic diagram showing that the upper surface 132 is in an inclined state is shown. The upper surface 132 forms an angle A with the wall of the side panel 120 facing the accommodating cavity 101, and the angle A is greater than 0 degrees and less than or equal to 90 degrees. In other words, the upper surface 132 of the protrusion 130 becomes higher and higher from the side panel 120 to the end away from the side panel 120. A guide groove is formed at the connection between the protrusion 130 and the side panel 120, which can prevent condensation or condensed water on the side panel 120 from flowing to the battery module 210. It is easy to understand that the guide hole 133 can be provided on the upper surface 132, or at the junction of the upper surface 132 and the side panel 120, or the guide hole 133 is provided on the upper surface 132 and the junction, and no specific limitation is made here. The number and shape of the guide holes 133 are not limited, as long as the condensed water can be discharged.

[0048] Optionally, the side plate 120 is a hollow structure. The side plate 120 includes a first wall 141 and a second wall 143 that are arranged opposite to each other, the protrusion 130 is connected to the first wall 141, and the second wall 143 is provided with a drainage hole 121. A chamber 125 is formed between the first wall 141 and the second wall 143, and the chamber 125 is used to connect the drainage hole 121 and the guide hole 133. Condensed water slides to the bottom of the side plate 120, enters the chamber 125 from the guide hole 133, and is then discharged from the drainage hole 121.

[0049] Combination Fig. 9 and Fig.10 Optionally, the upper surface 132 is provided with a recessed portion 135, and the recessed portion 135 is provided with a guide hole 133. That is, the upper surface 132 is a non-planar setting, such as a concave curved surface setting, such as an arc surface. Or it is a combination of multiple concave connected planes and curved surfaces, which is not specifically limited here. Optionally, the cross-section of the recessed portion 135 is U-shaped, such as Fig. 9 Or the cross section of the recessed portion 135 is in the shape of an arc, as shown in FIG. Fig.10 As shown. That is, the concave portion 135 of the upper surface 132 forms a guide groove, and the guide hole 133 can be opened at any position of the concave portion 135, such as any position of the groove bottom and the surrounding wall of the guide groove. Of course, the guide hole 133 can also be opened in the concave portion 135 or at the junction of the concave portion 135 and the side plate 120, which is not specifically limited here. Of course, the cross-sectional shape of the concave portion 135 can also be V-shaped, W-shaped or other arbitrary shapes, which is not specifically limited here.

[0050] It can be understood that a reinforcing rib 145 is provided between the first wall 141 and the second wall 143, and the reinforcing rib 145 is used to improve the strength of the side plate 120. The side plate 120 also includes a bottom wall 147 and a top wall 149 connecting the first wall 141 and the second wall 143, and the bottom wall 147 and the top wall 149 are arranged opposite to each other. The bottom wall 147 is connected to the bottom plate 110, and the top wall 149 is connected to the top cover 220 of the box. Optionally, the bottom wall 147, the first wall 141, the second wall 143 and the reinforcing rib 145 together form a chamber 125 to guide condensed water.

[0051] Optionally, the battery box 100 further includes a cold plate 150, which is connected to the bottom plate 110, and the side plate 120 is connected to a side of the cold plate 150 away from the bottom plate 110. In this embodiment, the bottom wall 147 and the protrusion 130 of the side plate 120 are fixedly connected to the cold plate 150, respectively.

[0052] Combination Fig.11 Optionally, a flow channel 151 is provided in the cold plate 150. The battery case 100 further includes a liquid inlet pipe 154 and a liquid outlet pipe 155. The cold plate 150 is provided with an inlet 152 and an outlet 153 connected to the flow channel 151. The inlet 152 is connected to the liquid inlet pipe 154, and the outlet 153 is connected to the liquid outlet pipe 155. The liquid inlet pipe 154 and the liquid outlet pipe 155 penetrate the side plate 120 and extend to the outside of the accommodating cavity 101. The battery module 210 is directly attached to the cold plate 150. The setting of the cold plate 150 can achieve rapid heat dissipation of the battery module 210.

[0053] Optionally, the drain hole 121 passes through the second wall 143 of the side plate 120, and a drain valve 123 is provided in the drain hole 121. The drain valve 123 is used to open and close the drain hole 121. When the drain valve 123 is opened, condensed water can be discharged from the drain hole 121. The shape and number of the drain hole 121 are not limited. The drain hole 121 is provided at a lower position of the side plate 120, that is, the position of the side plate 120 close to the bottom plate 110, which is conducive to the complete discharge of condensed water.

[0054] The side plate 120 may include a plurality of plates connected end to end and spliced ​​together. The plurality of plates may be fixed by welding, bonding, clamping, bolting, etc., preferably by welding or bonding to improve the sealing of the connection and prevent condensed water from flowing to the battery module 210.

[0055] Combination Fig.12 and Fig.13 The utility model further provides a battery pack 200 , including a battery module 210 and a battery case 100 as in any one of the aforementioned embodiments, wherein the battery module 210 is disposed in the accommodating cavity 101 .

[0056] Optionally, the battery case 100 also includes a top cover 220, and the top cover 220 and the bottom plate 110 are arranged opposite to each other, and the top cover 220 is connected to the end of the side plate 120 away from the bottom plate 110. The arrangement of the top cover 220 allows the battery module 210 to be located in the closed accommodating cavity 101, thereby providing better protection for the battery module 210. The battery module 210 is fixed to the cold plate 150 by bonding with a thermally conductive material to improve the heat exchange efficiency. The battery pack 200 also includes a connecting row 230 and an insulating plate 240, and the connecting row 230 is electrically connected to the poles of each battery, and the connecting row 230 is located on the side of the battery module 210 close to the top cover 220, and the insulating plate 240 covers the connecting row 230 to provide electrical isolation and insulation.

[0057] In a low-temperature environment, when the battery pack 200 generates heat due to the charging and discharging of the battery module 210 or the battery system starts the heating module, the air temperature inside the battery pack 200 rises rapidly, while the box frame (side panel 120) is in direct contact with the lower temperature of the external environment. When the higher temperature air inside the battery pack 200 contacts the lower temperature inner wall of the side panel 120 and condenses, the liquid generated by the condensation flows to the protrusion 130 at the bottom of the side panel 120 due to gravity, and flows into and is stored in the chamber 125 inside the side panel 120 through the guide hole 133 on the protrusion 130. The drain valve 123 is opened and the condensed liquid can be discharged to the outside of the battery box 100 through the drain hole 121 at the bottom of the side panel 120, avoiding the influence of condensed water on the battery module 210.

[0058] In summary, the battery box 100 and the battery pack 200 provided in the embodiment of the utility model have the following beneficial effects, including:

[0059] The battery case 100 proposed in the embodiment of the utility model is provided with a protrusion 130 at the bottom of the side panel 120, and a guide hole 133 is opened on the protrusion 130. If condensed water is formed on the inner wall of the side panel 120, the condensed water can slide along the side panel 120 to the protrusion 130 and be discharged out of the case from the guide hole 133. In this way, the condensed water can be prevented from contacting the battery module 210, and insulation failure of the battery pack 200 can be avoided, thereby improving safety.

[0060] The battery pack 200 proposed in the embodiment of the utility model includes the above-mentioned battery case 100 , which can smoothly discharge condensed water, reduce the impact of condensed water on the battery module 210 , and improve the safety of the battery module 210 .

[0061] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: A bottom plate (110); A side plate (120), wherein the side plate (120) is connected to the bottom plate (110), and the two together enclose a receiving cavity (101); the side plate (120) is provided with a drainage hole (121); An end of the side plate (120) close to the bottom plate (110) is provided with a protrusion (130) extending into the accommodating cavity (101), and a guide hole (133) is provided on the protrusion (130); The flow guide hole (133) is in communication with the liquid discharge hole (121).

2. The battery box according to claim 1, characterized in that: The protrusion (130) comprises an end surface (131) away from the side plate (120) and an upper surface (132) away from the bottom plate (110); the end surface (131) and the upper surface (132) are connected at an angle; and the upper surface (132) is provided with a plurality of guide holes (133) arranged at intervals.

3. The battery box according to claim 2, characterized in that: The upper surface (132) is plane, and an angle is formed between the upper surface (132) and a wall surface of the side plate (120) facing the accommodating cavity (101), and the angle is greater than 0 degrees and less than or equal to 90 degrees.

4. The battery box according to claim 2, characterized in that: The upper surface (132) is provided with a recessed portion (135), and the recessed portion (135) is provided with the guide hole (133).

5. The battery box according to claim 4, characterized in that: The cross section of the recessed portion (135) is U-shaped or arc-shaped.

6. The battery box according to claim 1, characterized in that: The side plate (120) is a hollow structure, comprising a first wall body (141) and a second wall body (143) arranged opposite to each other, the protrusion (130) is connected to the first wall body (141), and the second wall body (143) is provided with the drainage hole (121); A chamber (125) is formed between the first wall body (141) and the second wall body (143), and the chamber (125) is used to connect the drainage hole (121) and the guide hole (133).

7. The battery box according to claim 1, characterized in that: It also includes a cold plate (150), wherein the cold plate (150) is connected to the bottom plate (110), and the side plate (120) is connected to a side of the cold plate (150) away from the bottom plate (110).

8. The battery case according to claim 7, characterized in that: It also includes a liquid inlet pipe (154) and a liquid outlet pipe (155), the cold plate (150) is provided with an inlet (152) and an outlet (153), the inlet (152) is connected to the liquid inlet pipe (154), the outlet (153) is connected to the liquid outlet pipe (155), the liquid inlet pipe (154) and the liquid outlet pipe (155) pass through the side plate (120) and extend to the outside of the accommodating cavity (101).

9. The battery case according to any one of claims 1 to 8, characterized in that: A liquid discharge valve (123) is provided in the liquid discharge hole (121).

10. A battery pack, characterized in that: It comprises a battery module (210) and a battery box as claimed in any one of claims 1 to 9, wherein the battery module (210) is arranged in the accommodating cavity (101).

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