Battery box and battery

Abstract

The invention provides a battery box and a battery, and relates to the technical field of batteries, the battery box comprises a box body frame, a box body bottom plate and a heat management assembly, the box body bottom plate is arranged at the bottom end of the box body frame, and a water inlet runner and a water outlet runner which are communicated to an external circulating pipeline are arranged in the box body bottom plate; the heat management assembly is arranged in the box body frame and is provided with a circulating pipeline for realizing heat exchange with the side wall of the battery cell module, the water inlet end of the circulating pipeline is communicated with the water inlet runner, and the water outlet end of the circulating pipeline is communicated with the water outlet runner. Compared with the prior art, the side wall of the battery cell module is cooled through the circulating pipeline, the cooling and heat dissipation efficiency of the battery cell module is greatly improved in cooperation with the heat dissipation effect of the bottom plate of the box body, meanwhile, the water inlet flow channel and the water outlet flow channel are integrated on the bottom plate of the box body, a cold plate and the bottom plate are integrated, the space in a bag does not need to be occupied, the space in the box body is improved, and the heat dissipation efficiency of the battery cell module is improved. And the space utilization rate of the battery pack is greatly improved.

Description

Technical Field

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

[0002] Battery pack systems usually require temperature control and cooling. Conventional temperature control methods usually include liquid cooling and air cooling. Liquid cooling has a higher heat exchange efficiency and is therefore widely used in battery pack systems. Currently, the most common liquid cooling method on the market is to use an independent cold plate, that is, to set the cold plate on the outside of the battery cell module. On the one hand, this method has poor heat dissipation effect and is difficult to effectively achieve heat exchange with the battery cell module. On the other hand, it occupies the internal space of the box, resulting in a larger overall structure volume, which is not conducive to installation. Summary of the invention

[0003] The objectives of the present invention include, for example, providing a battery box and a battery, which can improve the heat dissipation effect and integrate the cold plate with the bottom plate of the box to save the internal space of the box.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a battery box, comprising:

[0006] The box frame includes two opening ends arranged opposite to each other along the Z direction;

[0007] A box bottom plate is arranged at one of the open ends of the box frame and is provided with a water inlet flow channel and a water outlet flow channel connected to an external circulation pipeline;

[0008] A thermal management component is arranged in the box frame and abuts against the box bottom plate, and the thermal management component has a circulation pipe for realizing heat exchange with the side wall of the battery cell module, the water inlet end of the circulation pipe is connected to the water inlet channel, and the water outlet end of the circulation pipe is connected to the water outlet channel.

[0009] In an optional embodiment, a water inlet joint and a water outlet joint are provided on one side of the bottom plate of the box along the Z direction toward the thermal management component, the thermal management component is connected to the water inlet joint and the water outlet joint, the water inlet joint is provided with a water inlet connected to the water inlet channel, the water outlet joint is provided with a water outlet connected to the water outlet channel, the water inlet is connected to the water inlet end of the circulation pipe, and the water outlet is connected to the water outlet end of the circulation pipe.

[0010] In an optional embodiment, the bottom plate of the box is partially recessed on one side along the Z direction away from the thermal management component to form a water inlet groove and a water outlet groove, the water inlet groove and the water outlet groove are spaced apart, the water inlet is connected to one end of the water inlet groove, and a sealing cover on the water inlet groove is provided with a water inlet channel plate to enclose the water inlet channel; the water outlet is connected to one end of the water outlet groove, and a sealing cover on the water outlet groove is provided with a water outlet channel plate to enclose the water outlet channel.

[0011] In an optional embodiment, an end of the water inlet channel plate away from the water inlet is provided with a water inlet pipe head protruding along the Z direction, and an end of the water outlet channel plate away from the water outlet is provided with a water outlet pipe head protruding along the Z direction.

[0012] In an optional embodiment, the thermal management component includes a water inlet connecting pipe, a water outlet connecting pipe and a cooling circulation pipe, the water inlet connecting pipe is connected to the water inlet joint and communicates with the water inlet, the water outlet connecting pipe is connected to the water outlet joint and communicates with the water outlet, the cooling circulation pipe is connected to the water inlet connecting pipe and the water outlet connecting pipe at the same time, and is used to extend to the outer wall of the battery cell module, and the water inlet connecting pipe, the water outlet connecting pipe and the cooling circulation pipe together form the circulation pipeline.

[0013] In an optional embodiment, there are multiple cooling circulation pipes, and the thermal management component also includes a manifold and a diverter pipe. The multiple cooling circulation pipes are distributed in the box frame in sequence and at intervals. The manifold is connected to the multiple cooling circulation pipes at the same time, the water outlet connecting pipe is connected to the manifold, the diverter pipe is connected to the multiple cooling circulation pipes at the same time, the water inlet connecting pipe is connected to the diverter pipe, and the water outlet connecting pipe is connected to the manifold.

[0014] In an optional embodiment, each of the cooling circulation pipes includes a first current collector, a cooling pipe body and a second current collector, a plurality of the cooling pipe bodies are arranged in parallel in the box frame along the Y direction, the first current collector and the second current collector are respectively arranged at both ends of the cooling pipe body, and a plurality of the first current collectors are simultaneously connected to the manifold and the diverter pipe;

[0015] A first partition is provided in the middle of the inner cavity of the first current collector along the X direction, and the first partition divides the inner cavity of the first current collector into a first manifold and a second manifold, the first manifold is connected to the water inlet connecting pipe, and the second manifold is connected to the water outlet connecting pipe;

[0016] A second partition is arranged in the middle of the inner cavity of the cooling tube body along the X direction, and the second partition divides the inner cavity of the cooling tube body into a refrigerant inlet channel and a refrigerant outflow channel. The refrigerant inlet channel is connected to the first collecting cavity, and the refrigerant outflow channel is connected to the second collecting cavity. The inner cavity of the second collecting cavity is simultaneously connected to the refrigerant inlet channel and the refrigerant outflow channel.

[0017] In an optional embodiment, the second current collector is bent relative to the cooling tube body.

[0018] In an optional embodiment, a heat-conducting medium layer is formed on the surface of the cooling tube body.

[0019] In an optional embodiment, the cooling tube body is serpentine-shaped, and has a plurality of arc grooves formed on both sides for fitting with the outer wall of the battery core module.

[0020] In a second aspect, the present invention provides a battery, comprising a battery cell module and a battery box as described in any one of the aforementioned embodiments, wherein the battery cell module is accommodated in the box frame and assembled on the box bottom plate.

[0021] The beneficial effects of the embodiments of the present invention include, for example:

[0022] The battery box and battery provided by the embodiment of the present invention have a box bottom plate arranged at the bottom end of the box frame, and a water inlet channel and a water outlet channel connected to an external circulation pipe are arranged in the box bottom plate, and the thermal management component is also arranged in the box frame, and has a circulation pipe for realizing heat exchange with the battery cell module. The circulation pipe is used to dissipate the heat from the side walls of the battery cell module, and the heat dissipation effect of the box bottom plate is combined with the cooling efficiency, which is greatly improved. At the same time, the water inlet channel and the water outlet channel are integrated into the box bottom plate, so that the cold plate is integrated with the bottom plate, and does not need to occupy the space inside the package, thereby increasing the internal space of the box and greatly improving the space utilization rate of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 1 A schematic diagram of the structure of a battery box provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the internal structure of a battery box provided in an embodiment of the present invention;

[0026] Figure 3 for Figure 1 Schematic diagram of the top side of the bottom plate of the middle box;

[0027] Figure 4 for Figure 1 Schematic diagram of the bottom side of the middle box bottom plate;

[0028] Figure 5 for Figure 1 A schematic diagram of the structure of the thermal management component in the first perspective;

[0029] Figure 6 for Figure 1 A schematic diagram of the structure of the thermal management component in the second viewing angle;

[0030] Figure 7 for Figure 5 Schematic diagram of the internal structure of the cooling circulation pipe.

[0031] Icons: 100-battery box; 110-box frame; 130-box bottom plate; 131-water inlet channel; 132-water outlet channel; 133-water inlet joint; 134-water outlet joint; 135-water inlet trough; 136-water outlet trough; 137-water inlet channel plate; 1371-water inlet pipe head; 138-water outlet channel plate; 1381-water outlet pipe head; 150-thermal management component; 151-water inlet connecting pipe; 152-water outlet connecting pipe; 153-cooling circulation pipe; 154-manifold; 155-diverter; 156-first collector; 1561-first partition; 1562-first collector cavity; 1563-second collector cavity; 157-cooling pipe body; 1571-second partition; 1572-refrigerant inflow channel; 1573-refrigerant outflow channel; 158-second collector; 159-heat conductive medium layer. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] 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 invention claimed for protection, 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.

[0034] 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.

[0035] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.

[0036] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0037] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0038] Please refer to Figure 1 and Figure 2 The embodiment of the present invention provides a battery box 100, which can improve the heat dissipation effect and integrate the cold plate with the box bottom plate 130 to save the internal space of the box.

[0039] The battery box 100 provided in the embodiment of the present invention includes a box frame 110, a box bottom plate 130 and a thermal management component 150. The box bottom plate 130 includes two open ends arranged opposite to each other along the Z direction. The box bottom plate 130 is arranged at one of the open ends of the box frame 110, for example, it can be arranged at the bottom end, and is provided with an inlet channel 131 and an outlet channel 132 connected to an external circulation pipe inside; the thermal management component 150 is arranged in the box frame 110 and abuts against the box bottom plate 130, and the thermal management component 150 has a circulation pipe for realizing heat exchange with the side wall of the battery cell module, the water inlet end of the circulation pipe is connected to the water inlet channel 131, and the water outlet end of the circulation pipe is connected to the water outlet channel 132.

[0040] It should be noted that the battery box 100 provided in the embodiment of the present invention has a box bottom plate 130 disposed at the bottom end of the box frame 110, and the box bottom plate 130 is provided with a water inlet channel 131 and a water outlet channel 132 connected to an external circulation pipe. At the same time, the thermal management component 150 is also arranged in the box frame 110, and has a circulation pipe for realizing heat exchange with the battery cell module. The circulation pipe is used to dissipate the heat from the side walls of the battery cell module, and the heat dissipation effect of the box bottom plate 130 is combined with the box bottom plate 130 to greatly improve its cooling and heat dissipation efficiency. At the same time, the water inlet channel 131 and the water outlet channel 132 are integrated into the box bottom plate 130, so that the cold plate is integrated with the bottom plate, and does not need to occupy the space inside the package, thereby improving the internal space of the box and greatly improving the space utilization of the battery pack.

[0041] In some embodiments, the box frame 110 includes four box walls at the front, back, left and right sides, and is fixed to the box bottom plate 130 by welding. The thermal management component 150 can be accommodated in the box frame 110 and set on the box bottom plate 130.

[0042] See also Figures 2 to 4 In some embodiments, a water inlet joint 133 and a water outlet joint 134 are provided on one side of the box bottom plate 130 along the Z direction toward the thermal management component 150. Preferably, the water inlet joint 133 and the water outlet joint 134 can be provided on the top surface of the box bottom plate 130. The thermal management component 150 is connected to the water inlet joint 133 and the water outlet joint 134. The water inlet joint 133 is provided with a water inlet connected to the water inlet channel 131, and the water outlet joint 134 is provided with a water outlet connected to the water outlet channel 132. The water inlet is connected to the water inlet end of the circulation pipeline, and the water outlet is connected to the water outlet end of the circulation pipeline. Specifically, the water inlet joint 133 and the water outlet joint 134 protrude from the surface of the box bottom plate 130, and can be integrally provided on the box bottom plate 130 or sealedly installed on the box bottom plate 130, so as to facilitate the connection of the thermal management component 150 with the water inlet joint 133 and the water outlet joint 134. The water inlet on the water inlet joint 133 penetrates downward to the water inlet channel 131, so that the liquid cooling medium in the water inlet channel 131 enters the circulation pipeline from the water inlet, and then enters the water outlet channel 132 from the water outlet after heat exchange to achieve circulation.

[0043] In some embodiments, a water inlet groove 135 and a water outlet groove 136 are formed in a local depression on one side of the bottom plate 130 of the box body away from the thermal management component 150 along the Z direction. Preferably, the water inlet groove 135 and the water outlet groove 136 can be formed in a local depression on the bottom side surface. The water inlet groove 135 and the water outlet groove 136 are arranged at intervals. The water inlet is connected to one end of the water inlet groove 135, and a sealing cover is provided on the water inlet groove 135 with a water inlet channel plate 137 to enclose a water inlet channel 131; the water outlet is connected to one end of the water outlet groove 136, and a sealing cover is provided on the water outlet groove 136 with a water outlet channel plate 138 to enclose a water outlet channel 132. Specifically, the water inlet groove 135 and the water outlet groove 136 are arranged in parallel on the bottom surface of the box bottom plate 130, and are respectively surrounded by the water inlet channel plate 137 and the water outlet channel plate 138 to form the water inlet channel 131 and the water outlet channel 132. The water inlet channel plate 137 and the water outlet channel plate 138 are detachable structures, which facilitates the inspection and cleaning of the clean water channel and the water outlet channel 132. Among them, the water inlet channel plate 137 is sealed with the edge of the water inlet groove 135, and the water outlet channel plate 138 is sealed with the edge of the water outlet groove 136. Specifically, the sealing characteristics can be ensured by stir friction welding.

[0044] In some embodiments, an end of the water inlet channel plate 137 away from the water inlet is provided with a water inlet pipe head 1371 along the Z direction, and an end of the water outlet channel plate 138 away from the water outlet is provided with a water outlet pipe head 1381 along the Z direction. Specifically, the water inlet joint 133 and the water outlet joint 134 can be arranged at a position close to the edge of the box bottom plate 130, and the water inlet pipe head 1371 and the water outlet pipe head 1381 can be arranged at a position close to the center of the box bottom plate 130. The water inlet and the water inlet pipe head 1371, the water outlet and the water outlet pipe head 1381 are arranged in a staggered manner, so as to give full play to the confluence effect of the water inlet channel 131 and the water outlet channel 132, avoid the water flow impact caused by direct current, extend the water flow path, and store a certain amount of liquid cooling medium. In addition, through the water inlet channel 131 and the water outlet channel 132, heat exchange can be formed at the box bottom plate 130, further improving the heat exchange effect with the internal battery cells.

[0045] See also Figures 5 to 7The thermal management component 150 includes a water inlet connecting pipe 151, a water outlet connecting pipe 152 and a cooling circulation pipe 153. The water inlet connecting pipe 151 is connected to the water inlet joint 133 and communicates with the water inlet. The water outlet connecting pipe 152 is connected to the water outlet joint 134 and communicates with the water outlet. The cooling circulation pipe 153 is connected to the water inlet connecting pipe 151 and the water outlet connecting pipe 152 at the same time, and is used to extend to the outer wall of the battery cell module. The water inlet connecting pipe 151, the water outlet connecting pipe 152 and the cooling circulation pipe 153 together form a circulation pipeline. Specifically, the water inlet connecting pipe 151 is detachably connected to the water inlet joint 133, the water outlet connecting pipe 152 is detachably connected to the water outlet joint 134, and the cooling circulation pipe 153 extends between two adjacent rows of battery cells, thereby realizing heat exchange with the battery cells. In addition, the water inlet connecting pipe 151 and the water outlet connecting pipe 152 can also play a supporting and fixing role for the cooling circulation pipe 153 to ensure the stability of the overall structure.

[0046] In some embodiments, there are multiple cooling circulation pipes 153, and the thermal management component 150 further includes a manifold 154 and a shunt pipe 155. The multiple cooling circulation pipes 153 are sequentially spaced apart in the box frame 110. The manifold 154 is simultaneously connected to the multiple cooling circulation pipes 153, the water outlet connecting pipe 152 is connected to the manifold 154, the shunt pipe 155 is simultaneously connected to the multiple cooling circulation pipes 153, the water inlet connecting pipe 151 is connected to the shunt pipe 155, and the water outlet connecting pipe 152 is connected to the manifold 154. Specifically, the multiple cooling circulation pipes 153 extend into the gaps between the battery cells of different columns, respectively, so that heat exchange can be performed with multiple columns of battery cells at the same time, and the manifold 154 plays a converging role, and the water outlets of the multiple cooling circulation pipes 153 are sent to the water outlet connecting pipe 152 after converging, and the shunt pipe 155 plays a diverting role, and the liquid cooling medium in the water inlet connecting pipe 151 is diverted and sent to the multiple cooling circulation pipes 153. Due to the arrangement of the flow divider 155, the multiple cooling circulation pipes 153 can receive the liquid cooling medium equally, and the water inlet temperature in the multiple cooling circulation pipes 153 can be kept consistent, thus ensuring the consistency of the heat exchange effect. Due to the arrangement of the confluence pipe 154, the multiple cooling circulation pipes 153 can send the liquid cooling medium after heat exchange to the water outlet connection pipe 152 after confluence, so that the liquid cooling medium after heat exchange can be quickly converged and evenly heated, thus reducing the heat load of the external circulation pipe.

[0047] In other preferred embodiments of the present invention, a single cooling circulation pipe 153 may also be used. In this case, the water inlet connecting pipe 151 and the water outlet connecting pipe 152 are no longer provided. The single circulation pipe can sequentially penetrate multiple rows of battery cells and bend multiple times in a serpentine distribution manner to contact each battery cell, which can also achieve heat exchange with multiple battery cells. The specific structure of the single cooling circulation pipe 153 is not described in detail here.

[0048] In some embodiments, each cooling circulation pipe 153 includes a first current collector 156, a cooling tube body 157, and a second current collector 158. A plurality of cooling tube bodies 157 are arranged in parallel in the box frame 110 along the Y direction. The first current collector 156 and the second current collector 158 are connected and arranged at both ends of the cooling tube body 157, respectively. A plurality of first current collectors 156 are simultaneously connected to the manifold 154 and the diverter 155. A first partition 1561 is arranged in the middle of the inner cavity of the first current collector 156 along the X direction. The first partition 1561 divides the inner cavity of the first current collector 156 into a first manifold cavity 1562 and a second manifold cavity 1564. The flow cavity 1563, the first collecting cavity 1562 is connected to the water inlet connecting pipe 151, the second collecting cavity 1563 is connected to the water outlet connecting pipe 152, and a second partition 1571 is arranged in the middle of the inner cavity of the cooling tube body 157 along the X direction. The second partition 1571 divides the inner cavity of the cooling tube body 157 into a refrigerant inlet channel 1572 and a refrigerant outflow channel 1573. The refrigerant inflow channel 1572 is connected to the first collecting cavity 1562, and the refrigerant outflow channel 1573 is connected to the second collecting cavity 1563. The inner cavity of the second collector 158 is connected to the refrigerant inflow channel 1572 and the refrigerant outflow channel 1573 at the same time. Among them, the first collecting chamber 1562 and the second collecting chamber 1563 are respectively located above and below, and preferably the first collecting chamber 1562 can be located above the second collecting chamber 1563, and the first partition plate 1561 can be located in the middle of the first collecting chamber 156, so that the volumes of the first collecting chamber 1562 and the second collecting chamber 1563 are the same, so that the flow of the liquid cooling medium is more stable and reliable.

[0049] Specifically, the first current collector 156 is arranged at the proximal end close to the water inlet joint 133 and the water outlet joint 134, and the second current collector 158 is arranged at the distal end away from the water inlet joint 133 and the water outlet joint 134. The liquid cooling medium in the water inlet is diverted by the diverter pipe 155 after passing through the water inlet connecting pipe 151, and then respectively sent to the first collecting chamber 1562 in the multiple first current collectors 156, and then enters the refrigerant inflow channel 1572 after passing through the first collecting chamber 1562. The liquid cooling medium in the refrigerant inflow channel 1572 realizes heat exchange with the battery cell and flows to the second current collector 158, and then flows to the refrigerant outflow channel 1573 through the second current collector 158. At this time, it will also realize further heat exchange with the battery cell, and then flows from the refrigerant outflow channel 1573 to the second collecting chamber 1563 of the first current collector 156, and flows into the water outlet connecting pipe 152 through the confluence pipe 154 and then enters the water outlet. The second current collector 158 can realize the reversal and reflux of the liquid cooling medium.

[0050] In some embodiments, the second current collector 158 is bent relative to the cooling tube body 157. Specifically, the plurality of second current collectors 158 are bent in the same direction, and the bent second current collectors 158 can buffer the liquid cooling medium inside the cooling tube body 157, ensuring that the liquid cooling medium can be smoothly turned back, and preventing the liquid cooling medium from directly impacting the second current collector 158 and causing local turbulence, thereby affecting the normal flow of the liquid cooling medium.

[0051] In some embodiments, a heat-conducting medium layer 159 is formed on the surface of the cooling tube body 157. Specifically, the heat-conducting medium layer 159 can be made of a material with good thermal conductivity, such as a copper layer, which can transfer heat between the cooling tube body 157 and the surface of the battery core more quickly.

[0052] In some embodiments, the cooling tube body 157 is serpentine-shaped, and has multiple arc grooves on both sides for fitting with the outer wall of the battery module. Specifically, by using the serpentine-shaped cooling tube body 157, the cooling tube body 157 can better fit the surface of the battery cell, increase the contact area, and improve the heat exchange efficiency.

[0053] The embodiment of the present invention further provides a battery, including a battery cell module and the aforementioned battery box 100, wherein the battery box 100 includes a box frame 110, a box bottom plate 130 and a thermal management component 150, wherein the box bottom plate 130 is arranged at the bottom end of the box frame 110, and is provided with an inlet channel 131 and an outlet channel 132 connected to an external circulation pipeline; the thermal management component 150 is arranged in the box frame 110, and the thermal management component 150 has a circulation pipeline for realizing heat exchange with the side wall of the battery cell module, wherein the inlet end of the circulation pipeline is connected to the inlet channel 131, and the outlet end of the circulation pipeline is connected to the outlet channel 132. The battery cell module is accommodated in the box frame 110 and assembled on the box bottom plate 130.

[0054] In summary, the battery box 100 and the battery provided by the embodiment of the present invention have a box bottom plate 130 at the bottom end of the box frame 110, and the box bottom plate 130 is provided with a water inlet channel 131 and a water outlet channel 132 connected to an external circulation pipe, and the thermal management component 150 is also arranged in the box frame 110, and has a circulation pipe for realizing heat exchange with the battery cell module. The circulation pipe is used to dissipate the heat of the side wall of the battery cell module, and the heat dissipation effect of the box bottom plate 130 is combined with the box bottom plate 130 to greatly improve its cooling and heat dissipation efficiency. At the same time, the water inlet channel 131 and the water outlet channel 132 are integrated into the box bottom plate 130, so that the cold plate is integrated with the bottom plate, and does not need to occupy the space inside the package, thereby improving the internal space of the box and greatly improving the space utilization of the battery pack.

[0055] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A battery box, characterized in that: include: The box frame (110) comprises two opening ends arranged opposite to each other along the Z direction; A box bottom plate (130) is arranged at one of the open ends of the box frame (110), and is provided with a water inlet channel (131) and a water outlet channel (132) connected to an external circulation pipeline; A thermal management component (150), the thermal management component (150) being arranged in the box frame (110) and abutting against the box bottom plate (130), and the thermal management component (150) having a circulation pipe for achieving heat exchange with the side wall of the battery cell module, the water inlet end of the circulation pipe being connected to the water inlet channel (131), and the water outlet end of the circulation pipe being connected to the water outlet channel (132).

2. The battery box according to claim 1, characterized in that: A water inlet joint (133) and a water outlet joint (134) are provided on one side of the box bottom plate (130) along the Z direction toward the thermal management component (150); the thermal management component (150) is connected to the water inlet joint (133) and the water outlet joint (134); the water inlet joint (133) is provided with a water inlet connected to the water inlet channel (131); the water outlet joint (134) is provided with a water outlet connected to the water outlet channel (132); the water inlet is connected to the water inlet end of the circulation pipeline; and the water outlet is connected to the water outlet end of the circulation pipeline.

3. The battery box according to claim 2, characterized in that: A side of the bottom plate (130) of the box body away from the thermal management component (150) along the Z direction is partially recessed to form a water inlet groove (135) and a water outlet groove (136); the water inlet groove (135) and the water outlet groove (136) are arranged at intervals; the water inlet is connected to one end of the water inlet groove (135), and a sealing cover on the water inlet groove (135) is provided with a water inlet channel plate (137) to enclose and form the water inlet channel (131); the water outlet is connected to one end of the water outlet groove (136), and a sealing cover on the water outlet groove (136) is provided with a water outlet channel plate (138) to enclose and form the water outlet channel (132).

4. The battery box according to claim 3, characterized in that: An end of the water inlet channel plate (137) away from the water inlet is provided with a water inlet pipe head (1371) protruding along the Z direction, and an end of the water outlet channel plate (138) away from the water outlet is provided with a water outlet pipe head (1381) protruding along the Z direction.

5. The battery box according to any one of claims 2 to 4, characterized in that: The thermal management component (150) comprises a water inlet connecting pipe (151), a water outlet connecting pipe (152) and a cooling circulation pipe (153); the water inlet connecting pipe (151) is connected to the water inlet joint (133) and communicates with the water inlet; the water outlet connecting pipe (152) is connected to the water outlet joint (134) and communicates with the water outlet; the cooling circulation pipe (153) is simultaneously communicated with the water inlet connecting pipe (151) and the water outlet connecting pipe (152) and is used to extend to the outer wall of the battery module; and the water inlet connecting pipe (151), the water outlet connecting pipe (152) and the cooling circulation pipe (153) together form the circulation pipeline.

6. The battery box according to claim 5, characterized in that: There are a plurality of cooling circulation pipes (153), and the thermal management component (150) further comprises a converging pipe (154) and a diverting pipe (155). The plurality of cooling circulation pipes (153) are sequentially spaced apart and distributed in the box frame (110). The converging pipe (154) is simultaneously connected to the plurality of cooling circulation pipes (153), and the diverting pipe (155) is simultaneously connected to the plurality of cooling circulation pipes (153). The water inlet connecting pipe (151) is connected to the diverting pipe (155), and the water outlet connecting pipe (152) is connected to the converging pipe (154).

7. The battery box according to claim 6, characterized in that: Each of the cooling circulation pipes (153) comprises a first current collector (156), a cooling pipe body (157) and a second current collector (158); a plurality of the cooling pipe bodies (157) are arranged in parallel along the Y direction in the box frame (110); the first current collector (156) and the second current collector (158) are respectively connected and arranged at two ends of the cooling pipe body (157); and a plurality of the first current collectors (156) are simultaneously connected to the manifold (154) and the diverter pipe (155); A first partition (1561) is arranged in the middle of the inner cavity of the first current collector (156) along the X direction, and the first partition (1561) divides the inner cavity of the first current collector (156) into a first manifold (1562) and a second manifold (1563), the first manifold (1562) is connected to the water inlet connecting pipe (151), and the second manifold (1563) is connected to the water outlet connecting pipe (152); A second partition (1571) is arranged in the middle part of the inner cavity of the cooling tube body (157) along the X direction, and the second partition (1571) divides the inner cavity of the cooling tube body (157) into a refrigerant inlet channel (1572) and a refrigerant outflow channel (1573). The refrigerant inlet channel (1572) is connected to the first collecting cavity (1562), and the refrigerant outflow channel (1573) is connected to the second collecting cavity (1563). The inner cavity of the second collecting cavity (158) is simultaneously connected to the refrigerant inlet channel (1572) and the refrigerant outflow channel (1573).

8. The battery box according to claim 7, characterized in that: The second current collector (158) is bent relative to the cooling tube body (157).

9. The battery box according to claim 7, characterized in that: The cooling tube body (157) is serpentine-shaped and has a plurality of arc-shaped grooves formed on both sides for fitting with the outer wall of the battery core module.

10. A battery, characterized in that: It comprises a battery cell module and a battery box as claimed in any one of claims 1 to 9, wherein the battery cell module is accommodated in the box frame (110) and assembled on the box bottom plate (130).

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