CN218448223U

CN218448223U - Battery box, battery and electric working machine

Info

Publication number: CN218448223U
Application number: CN202221005291.XU
Authority: CN
Inventors: 王西; 张一松; 王毅; 郭峰
Original assignee: Hunan Xingbida Netlink Technology Co Ltd
Current assignee: Hunan Xingbida Netlink Technology Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2023-02-03
Anticipated expiration: 2032-04-27

Abstract

The utility model relates to the technical field of power batteries, and provides a battery box body, a battery and an electric operation machine, wherein the battery box body comprises a hoisting component, a bearing part, a bottom plate and a plurality of sub-box bodies; the sub-box bodies are of a cylindrical structure with two through ends, the sub-box bodies are arranged in parallel and are mutually communicated, and an installation groove suitable for placing a liquid cooling plate is formed in each sub-box body; the hoisting assembly is arranged on one side of the plurality of sub-boxes away from the ground and is connected to the plurality of sub-boxes; the supporting piece is arranged on one side of the plurality of sub-boxes close to the ground and connected with the plurality of sub-boxes; the bottom plate is arranged on one side of the plurality of the sub-boxes and is suitable for sealing the sub-boxes at the edge position. A plurality of subboxes set up in layers, and the battery module can directly be placed in the subbox, need not place a plurality of standard boxes in frame system, has reduced the structural redundancy, and the space utilization of battery box is high, and whole energy density is higher, and technology is simpler, and the reliability is higher.

Description

Battery box, battery and electric working machine

Technical Field

The utility model relates to a power battery technical field especially relates to a battery box, battery and electric operation machinery.

Background

The power battery can provide power for transportation vehicles such as electric automobiles, electric bicycles and the like, is different from a starting battery of an automobile engine, and the conventional power battery mostly adopts a valve port sealed lead-acid storage battery, an open tubular lead-acid storage battery, a lithium iron phosphate storage battery and the like. The power battery has excellent performance, stable discharge voltage and obvious storage time. In the related technology, the battery system of the commercial vehicle is mainly in the form of different standard box combinations, namely after the standard boxes are assembled and combined, a set of frame system of the standard boxes is additionally made, so that the difficulty of wiring and pipeline arrangement between the boxes is increased, and the intersection of pipelines is inevitably caused in the assembling process due to the fixed positions of the plug connectors of the standard boxes, so that certain difficulty is brought to the assembling. The combination of the standard box and the frame system has the disadvantages of redundant structure, low overall energy density of the battery system, low space utilization rate, various and complex connecting circuits and pipelines, high process cost and low reliability.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the technical problems existing in the related art. Therefore, the utility model provides a battery box, battery box include a plurality of subboxes, and the battery module can directly be placed in a plurality of subboxes, need not place a plurality of standard cases in frame system, has reduced the structural redundancy, and battery system's space utilization is high, and whole energy density is higher.

The embodiment of the utility model provides a battery is still provided.

The embodiment of the utility model provides an electric operating machine is still provided.

According to the utility model discloses battery box, include:

the liquid cooling system comprises a plurality of sub-box bodies, a liquid cooling plate and a liquid cooling plate, wherein the sub-box bodies are of a cylindrical structure with two through ends, are arranged in parallel and are internally communicated, and each sub-box body is internally provided with an installation groove suitable for placing the liquid cooling plate;

the hoisting assembly is arranged on one side of the plurality of sub-boxes away from the ground and is connected to the plurality of sub-boxes;

the supporting piece is arranged on one side, close to the ground, of the plurality of sub-boxes and is connected to the plurality of sub-boxes;

and the bottom plate is arranged on one side of the plurality of the sub-boxes and is suitable for sealing the sub-boxes positioned at the edge positions.

According to the utility model discloses an embodiment, between a plurality of subboxes and the bottom plate with all sealing connection between the subbox.

According to the utility model discloses an embodiment, the subbox includes relative first end and second end, first end is formed with the seal groove, the seal groove is suitable for holding the second end of another subbox.

According to the utility model discloses an embodiment, the hoist and mount subassembly includes:

the hoisting frame is connected to the plurality of sub-boxes;

and the shielding box is connected to the plurality of sub-box bodies and is suitable for placing the heat management assembly and/or the circuit management assembly.

According to an embodiment of the present invention, the shielding box is provided with one number, the shielding box is further suitable for placing a water chiller unit, and the shielding box is provided with heat dissipation holes corresponding to the water chiller unit;

or the shielding box comprises a first shielding box and a second shielding box, the first shielding box is suitable for placing the heat management assembly, and the second shielding box is suitable for placing the circuit management assembly.

According to the utility model discloses an embodiment, be formed with heat transfer pipeline installing zone and electric lines installing zone in a plurality of subboxes, heat transfer pipeline installing zone with the electric lines installing zone is located relative both sides in a plurality of subboxes.

According to an embodiment of the present invention, the second end is formed with at least one first reinforcing rib;

and/or at least one second reinforcing rib is formed on the side wall of the sub-box body.

According to the utility model discloses an embodiment, the bottom plate is formed with and is suitable for placing the install bin that trades the electric connector.

According to the utility model discloses the battery that the embodiment of second aspect provided, include according to the utility model discloses the battery box that the embodiment of first aspect provided.

According to the utility model discloses electric operation machine that third aspect embodiment provided, include according to the utility model discloses the battery box that the embodiment of first aspect provided.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

according to the embodiment of the utility model, the battery box body comprises a hoisting component, a bearing part, a bottom plate and a plurality of sub-box bodies; the sub-box bodies are of a cylindrical structure with two through ends, the sub-box bodies are arranged in parallel and are mutually communicated, and each sub-box body is internally provided with an installation groove suitable for placing a liquid cooling plate; the hoisting assembly is arranged on one side of the plurality of sub-boxes away from the ground and is connected with the plurality of sub-boxes; the supporting piece is arranged on one side of the plurality of sub-boxes close to the ground and connected with the plurality of sub-boxes; the bottom plate is arranged on one side of the plurality of the sub-boxes and is suitable for sealing the sub-boxes at the edge positions. A plurality of subboxes set up in layers, and the battery module can directly be placed in the subbox, need not place a plurality of standard boxes in frame system, has reduced the structural redundancy, and battery system's space utilization is high, and whole energy density is higher, and technology is simpler, and the reliability is higher.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of a battery case according to a first embodiment of the present invention;

fig. 2 is an exploded view of a plurality of sub-cases and a bottom plate according to an embodiment of the present invention;

fig. 3 is a perspective view of a plurality of sub-cases and a bottom plate according to an embodiment of the present invention;

fig. 4 is a top view of the sub-box provided by the embodiment of the present invention;

fig. 5 is a front view of the sub-box provided by the embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 4 at A;

fig. 7 is a perspective view of a battery case according to a second embodiment of the present invention;

fig. 8 is a perspective view of a battery case according to a third embodiment of the present invention.

Reference numerals:

110. a sub-box body; 112. mounting grooves; 114. a first end; 116. a second end; 118. a sealing groove; 1102. a first reinforcing rib; 1104. a second reinforcing rib; 1106. a bolt;

120. hoisting the assembly; 122. a hoisting frame; 124. a shielding box; 124a, a first shielding box; 124b, a second shielding box; 1242. heat dissipation holes;

130. a support member; 140. a base plate; 142. installing a box; 152. a water chiller unit.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the utility model, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the utility model.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but 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 thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the related technology, the battery system of the commercial vehicle is mainly in the form of different standard box combinations, namely a frame system of a set of standard boxes is additionally made after the standard boxes are assembled and combined, so that the arrangement difficulty of wiring harnesses and pipelines between the boxes is increased, and the crossing of pipelines is inevitably caused in the assembling process due to the fixed positions of the plug connectors of the standard boxes, so that certain difficulty is brought to the assembling. The combination of the standard box and the frame system has the disadvantages of redundant structure, low overall energy density of the battery system, low space utilization rate, various and complex connecting circuits and pipelines, high process cost and low reliability.

Referring to fig. 1 to 8, the battery box according to an embodiment of the present invention includes a plurality of sub-boxes 110, a lifting assembly 120, a supporting member 130, and a bottom plate 140.

The battery box has certain accommodation space, and the battery module can be placed in the battery box with multirow, multiseriate and multilayer mode to promote battery system's charge capacity, and then promote duration.

The battery box body comprises a plurality of sub-box bodies 110, wherein the sub-box bodies 110 are of a cylindrical structure with two through ends, and two ends of the cylindrical structure are provided with openings. The plurality of sub-cases 110 are arranged in parallel, the interiors of the adjacent sub-cases 110 are communicated to form an integral case structure, and an installation groove 112 suitable for placing a liquid cooling plate is formed in each sub-case 110.

The hoisting assembly 120 is disposed on a side of the plurality of sub-cases 110 away from the ground, and when the hoisting assembly 120 is connected by a hoisting machine, the battery cases and the battery system can be moved.

In some embodiments, the lifting assembly 120 includes a lifting frame 122, the lifting frame 122 being connected to the plurality of sub-housings 110.

It will be appreciated that the hanger frame 122 has a certain structural strength to bear the load of the plurality of sub-cases 110, the battery module, and other components. When the sub-box 110 has a certain size, the plurality of hoisting frames 122 can be provided, and the plurality of hoisting frames 122 are symmetrically connected to the plurality of sub-boxes 110, so that the overturning phenomenon can not occur during hoisting. The number of the hoisting frame 122 can be one, and at this time, the hoisting frame 122 is arranged at the center of one side of the plurality of sub-boxes 110, so that the plurality of sub-boxes 110 cannot be inclined during hoisting.

It should be noted that the hoisting frame 122 may be a specially-made hanging structure, or may be a spliced or welded steel truss structure, and the hoisting frame 122 has a plurality of hoisting sites in a horizontal plane, such as a transverse hoisting site and a longitudinal hoisting site, where the transverse direction and the longitudinal direction only represent relative positions.

The supporting member 130 is disposed on a side of the plurality of sub-cases 110 close to the ground, and is used for bearing the load of the battery case or the battery system. The supporting member 130 is connected to the plurality of sub-cases 110, and can fix the positions of the plurality of sub-cases 110, thereby increasing the stability of the sub-cases 110 and the battery module, preventing the sub-cases 110 or the battery module from contacting the ground, and reducing the abrasion and corrosion of the sub-cases 110 and the battery module.

In some embodiments, the supporting member 130 is a steel truss structure, which has high strength and light weight, and is beneficial to reducing the total weight of the battery box and improving the energy density of the battery system.

In other embodiments, the support member 130 is a base of a unitary structure, and the size of the base is adapted to the size of the sub-housing 110.

It should be noted that the support member 130 is detachably connected to the battery case 100, for example, by bolts. In the case where the battery case 100 includes the bottom plate 140, the mounting case 142 is also bolted to the supporter 130.

The bottom plate 140 is disposed at one side of the plurality of sub-cases 110, and is adapted to close the sub-cases 110 located at the edge position, so that the sub-cases 110 are entirely in a sealed state, which is advantageous to installation of the battery module and temperature management.

It should be noted that, referring to fig. 1 to 8, the plurality of sub-tank bodies 110 may be vertically arranged in parallel, or may be horizontally arranged in layers, and the number of the sub-tank bodies 110 is not limited.

In a single sub-case 110, a plurality of rows and/or columns and/or layers of battery modules may be disposed, which may improve the energy density of the battery system. The embodiment of the utility model provides an in, need not set up independent standard box, reduced the unnecessary structure, space utilization is higher, and the pipe arrangement unified management in the battery box has reduced the criss-cross condition of pipeline simultaneously.

Insert the liquid cooling board in mounting groove 112, the liquid cooling board not only is used for fixed battery module, has still played temperature control's function, fully combines thermal management system and battery box, has promoted space utilization, has reduced the degree of difficulty of pipeline arrangement.

The battery module during operation and can appear temperature variation when carrying out the heat exchange with external environment, in order to promote the stability of battery module during operation, reduce the influence of temperature variation to battery module, can carry out temperature management to the battery module in the battery box.

In some embodiments, the connections between adjacent sub-housings 110 and between the sub-housings 110 and the bottom plate 140 are sealed.

It can be understood that the probability of interference from external temperature factors is reduced and the temperature stability of the battery module is improved when the battery module is located in a sealed space. When the battery box body is connected to the heat management system, the heat exchange efficiency of the heat management system is high, and the battery box body is more energy-saving and environment-friendly.

In some embodiments, the sub-tank 110 includes opposite first and second ends 114, 116, the first end 114 is formed with a seal groove 118, and the second end 116 of an adjacent sub-tank 110 is adapted to be inserted within the seal groove 118.

The second end 116 of the sub-box 110 is inserted into the first end 114 of the adjacent sub-box 110, and so on, the sub-boxes 110 are connected in sequence to form a layered/parallel box structure. The number of the sub-box bodies 110 is not limited, and the requirements of different power batteries can be met. In the power battery with higher endurance requirement, the number of the sub-cases 110 is larger, and in the power battery with lower endurance requirement, the number of the sub-cases 110 is smaller.

The sealing groove 118 is matched with the second end 116 of the other sub-case 110 to form a sealing structure after connection, so that heat exchange between the battery case and the outside can be reduced.

The battery system comprises a battery box body, a battery module, a thermal management system, an electrical system and the like, wherein the thermal management system comprises a water chiller 152, a thermal management assembly, a liquid cooling plate, a refrigerant pipe and the like, and the thermal management assembly is electrically connected with the water chiller 152 and used for controlling the on-off and the running power of the water chiller so as to ensure the stability of the temperature in the battery box body. The liquid cooling board is inserted and is established in mounting groove 112, and the battery module is connected in the liquid cooling board, and the liquid cooling board not only is used for fixed battery module, can also carry out heat exchange with the battery module, and water chilling unit 152 passes through the refrigerant pipe and communicates in the liquid cooling board, and then realizes the temperature management of battery module.

It should be noted that the number of the refrigerant pipes may be multiple, and the refrigerant pipes include at least one liquid inlet pipe and at least one liquid outlet pipe.

The electric system comprises a circuit management assembly, a module collecting copper bar, a battery replacing connector and the like, wherein all battery modules in the battery box body are electrically connected with the circuit management assembly through the module collecting copper bar, and the circuit management assembly is connected with the battery replacing connector through a high-voltage circuit and a low-voltage circuit to form a finished working circuit.

In the battery system, thermal management system and electrical system all connect in the battery box, can set up and shelter from the structure and protect thermal management system and electrical system, can avoid the interference of external factors such as rainwater.

In some embodiments, the hoist assembly 120 further comprises a shield box 124, the shield box 124 being adapted to house thermal management components and/or circuit management components.

Shelter from case 124 and set up in one side of a plurality of subboxes 110, inside has accommodation space, and thermal management subassembly and/or circuit management subassembly are placed in sheltering from case 124, can not receive the interference of external environment and rainwater, can make relevant electronic component steady operation, have promoted battery system's stability and reliability.

In some embodiments, referring to fig. 1, the shielding box 124 is one, the shielding box 124 traverses one side of the plurality of sub-boxes 110 and has a larger volume, and the thermal management component, the circuit management component and the water chiller are all disposed in the shielding box 124.

When the water chiller unit 152 is placed in the shielding box 124, the shielding box 124 is provided with a heat dissipation hole 1242 at a position corresponding to the water chiller unit, and the water chiller unit 152 releases heat to the outside through the heat dissipation hole 1242.

In other embodiments, referring to fig. 7 or 8, the shielding box 124 includes a first shielding box 124a and a second shielding box 124b, the first shielding box 124a being used for placing the thermal management component, and the second shielding box 124b being used for placing the circuit management component.

The first shielding box 124a and the second shielding box 124b are separately arranged, so that the installation and the use of the thermal management assembly and the circuit management assembly are facilitated, and the mutual interference among different electronic components is avoided.

According to the utility model discloses an embodiment, thermal management system includes a plurality of refrigerant pipes, and electrical system includes that a plurality of modules collect copper bar and high-low voltage circuit, and reasonable layout between different pipelines is favorable to practicing thrift the space of battery box, can reduce battery system's the equipment degree of difficulty, has still reduced the mutual interference between different pipelines simultaneously.

In some embodiments, heat exchange piping mounting areas (not shown) and electrical wiring mounting areas (not shown) are formed in the plurality of sub-housings 110, and the heat exchange piping mounting areas and the electrical wiring mounting areas are located at opposite sides within the plurality of sub-housings 110.

It can be understood that heat transfer pipeline installing zone and electric line installing zone are located the relative both sides in a plurality of subboxes 110, for example, heat transfer pipeline installing zone is located the left side of a plurality of subboxes 110, electric line installing zone is located the right side of a plurality of subboxes 110, the refrigerant pipe communicates in the liquid cooling board on the left side, high-low voltage circuit communicates at the right side collects the copper bar in the module and trades the electric connector, heat transfer pipeline and electric line subregion set up, can not take place alternately between the two, be favorable to the reasonable layout of different circuits.

In some embodiments, the second end 116 of the sub-case 110 is provided with at least one first reinforcing rib 1102, and the first reinforcing rib 1102 can improve the structural strength of the sub-case 110, so as to prevent the sub-case 110 from deforming under load.

Meanwhile, the first reinforcing rib 1102 is arranged below the mounting groove 112, the first reinforcing rib 1102 can also be used for supporting the liquid cooling plate, the stability of the battery module and the liquid cooling plate is improved, and the structural strength of the battery box is improved.

In other embodiments, at least one second reinforcing rib 1104 is further disposed on the side wall of the sub-tank 110, and a plurality of second reinforcing ribs 1104 are symmetrically disposed, so that the deformation resistance of the sub-tank 110 can be improved.

The adjacent sub-boxes 110 are connected through bolts 1106, and the bolts 1106 are connected to the second reinforcing ribs 1104 on the two adjacent layers of sub-boxes 110, so that the plurality of second reinforcing ribs 1104 can be connected in series end to form an integral structure, and the overall strength of the battery box is improved.

It should be noted that the bolts 1106 and the second reinforcing ribs 1104 may be disposed inside or outside the sub-tank 110, and the bolts 1106 are connected to two adjacent sub-tanks 110 and two adjacent second reinforcing ribs 1104.

According to an embodiment of the present invention, the bottom plate 140 is disposed at one side of the plurality of sub-housings 110, and is adapted to seal the sub-housings 110 located at the edge positions.

In some embodiments, a mounting box 142 is formed on the base plate 140, and the mounting box 142 is adapted to receive a charging connector of an electrical system.

The battery replacement connector is electrically connected with the circuit management assembly through a high-low voltage circuit, and the circuit management assembly is connected with the battery module through a module collection copper bar. The battery replacing connector can charge the battery module and can also be used for supplying power to the electric element, and the battery replacing connector is integrated with the bottom plate 140, so that the space of a battery box body is saved, and the space utilization rate is improved.

According to the battery (the attached drawing is not shown) that the embodiment of the second aspect of the utility model provides, include according to the battery box that the embodiment of the first aspect of the utility model provides.

It is understood that a plurality of rows and/or columns and/or layers of battery modules may be disposed in a single sub-housing 110, which may improve the energy density of the battery system. The independent standard box does not need to be arranged in the battery box body, unnecessary structures are reduced, the space utilization rate is high, and meanwhile, the pipeline arrangement in the battery box body is managed in a unified mode, and the condition of pipeline crossing is reduced.

According to the utility model discloses electric working machine (the attached drawing does not show) that the third aspect embodiment provided includes according to the utility model the battery box that the first aspect embodiment provided.

It is understood that a plurality of rows and/or a plurality of columns and/or a plurality of layers of battery modules may be disposed in a single sub-case 110, which may improve the energy density of the battery system. The independent standard box does not need to be arranged in the battery box body, unnecessary structures are reduced, the space utilization rate is high, and meanwhile, the pipeline arrangement in the battery box body is managed in a unified mode, so that the condition of pipeline intersection is reduced.

In summary, the battery box, the battery and the electric working machine according to the embodiment of the present invention include a hoisting assembly 120, a supporting member 130, a bottom plate 140 and a plurality of sub-boxes 110; the sub-tank 110 is a cylindrical structure with two through ends, the sub-tank 110 is arranged in parallel and the interior of the sub-tank is communicated with each other, and a mounting groove 112 suitable for placing a liquid cooling plate is formed in each sub-tank 110; the hoisting assembly 120 is arranged on one side of the plurality of sub-boxes 110 away from the ground and connected to the plurality of sub-boxes 110; the supporting member 130 is disposed on one side of the plurality of sub-cases 110 close to the ground, and is connected to the plurality of sub-cases 110; the bottom plate 140 is disposed at one side of the plurality of sub-housings 110 and adapted to enclose the sub-housings 110 at the edge position. The plurality of sub-box bodies 110 are arranged in a layered mode, the battery module can be directly placed in the sub-box bodies 110, a plurality of standard boxes are not required to be placed in a frame system, structural redundancy is reduced, the space utilization rate of a battery system is high, the overall energy density is high, the process is simple, and the reliability is high.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery case, comprising:

and the bottom plate is arranged on one side of the plurality of sub-boxes and is suitable for sealing the sub-boxes positioned at the edge.

2. The battery box body according to claim 1, wherein the plurality of sub-box bodies are hermetically connected to each other and the bottom plate and the sub-box bodies are hermetically connected to each other.

3. The battery case of claim 1, wherein the sub-case includes opposing first and second ends, the first end being formed with a sealing groove adapted to receive the second end of another sub-case.

4. The battery box body of any one of claims 1 to 3, wherein the hoisting assembly comprises:

the hoisting frame is connected to the plurality of sub-boxes;

5. The battery box body according to claim 4, wherein the shielding box is one in number, the shielding box is further suitable for placing a water cooling unit, and heat dissipation holes are formed in the shielding box corresponding to the water cooling unit;

6. The battery box body of claim 4, wherein heat exchange duct mounting areas and electrical line mounting areas are formed in the plurality of sub-box bodies, the heat exchange duct mounting areas and the electrical line mounting areas being located on opposite sides within the plurality of sub-box bodies.

7. The battery box of claim 3, wherein the second end is formed with at least one first reinforcing bead;

8. The battery box body as claimed in any one of claims 1 to 3, wherein the bottom plate is formed with a mounting box adapted to receive a replaceable electrical connector.

9. A battery comprising a battery case according to any one of claims 1 to 8.

10. An electric working machine, characterized by comprising the battery case according to any one of claims 1 to 8.