Battery box and battery pack

Abstract

This application discloses a battery housing and battery pack, including a housing body. The housing body includes a first battery compartment and a second battery compartment arranged along a first direction, separated by a first partition beam. The first battery compartment includes at least two sub-battery compartments arranged along a second direction, each of which is separated by a second partition beam. The first direction and the second direction are not parallel, and the arrangement direction of the individual cells in the first battery compartment is not parallel to the arrangement direction of the individual cells in the second battery compartment. This application arranges the second battery compartment along one side of the first battery compartment along the first direction. With the same number of battery packs, this arrangement can reduce the size of the battery housing along the second direction, making it easier to ensure the structural strength of the battery housing. The first partition beam between the first and second battery compartments also increases the strength of the battery housing and reduces the resonance intensity under vibration conditions.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery housing and battery pack. Background Technology

[0002] Battery packs are widely used in electric vehicles, power tools, energy storage systems, and other fields. A battery pack typically consists of a battery housing and battery cells housed within the housing. To ensure the output power of the battery pack, it usually contains at least two battery cells.

[0003] The battery pack contains multiple sequentially arranged sub-battery compartments, with each battery pack installed in its corresponding compartment. When there are many battery packs in the battery pack, the size of the battery pack along the direction of battery pack arrangement becomes too large. This makes it difficult for the structural strength of the battery pack to meet the requirements, and the battery resonance is more severe under vibration conditions.

[0004] Therefore, how to ensure that the structural strength of the battery box meets the requirements and reduce the resonance intensity under vibration conditions when setting up multiple battery packs is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a battery housing so that when multiple battery packs are installed, the structural strength of the battery housing can meet the requirements and reduce the resonance intensity under vibration conditions.

[0006] Another object of this application is to provide a battery pack having the above-described battery housing.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] The first aspect of this application provides a battery housing, including a housing body, the housing body including a first battery compartment and a second battery compartment arranged along a first direction, the first battery compartment and the second battery compartment being separated by a first partition beam, the first battery compartment including at least two sub-battery compartments arranged along a second direction, each of the sub-battery compartments being separated by a second partition beam, the first direction and the second direction being not parallel;

[0009] Both the first battery compartment and the second battery compartment are used to place battery packs, which include multiple individual cells. The arrangement direction of the individual cells in the first battery compartment is not parallel to the arrangement direction of the individual cells in the second battery compartment.

[0010] The battery housing provided in this application includes a first battery compartment and a second battery compartment, arranged along a first direction. The first battery compartment is divided into multiple sub-battery compartments by a second partition beam, and these sub-battery compartments are arranged along a second direction. The arrangement direction of the first and second battery compartments differs from the arrangement direction of the sub-battery compartments within the first battery compartment. When a large number of battery packs need to be arranged within the battery housing, a large number of sub-battery compartments along the second direction in the first battery compartment are required, resulting in a larger size of the battery housing along the second direction. This application provides a second battery compartment along one side of the first battery compartment along the first direction. With the same number of battery packs, this arrangement can reduce the size of the battery housing along the second direction, making it easier to ensure the structural strength of the battery housing. A first partition beam is provided between the first and second battery compartments, which also increases the strength of the battery housing and reduces the resonance intensity under vibration conditions.

[0011] A second aspect of this application provides a battery pack, including a battery housing and a battery pack, wherein the battery pack is disposed in both the first battery compartment and the second battery compartment.

[0012] The battery pack provided in this application has all the technical effects of the aforementioned battery housing, which will not be repeated here. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a partial structural diagram of the battery pack disclosed in an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the battery housing structure disclosed in an embodiment of this application;

[0016] Figure 3 This is a top view of the battery pack disclosed in the embodiments of this application after removing part of the battery pack.

[0017] The meanings of the various reference numerals in the figure are as follows:

[0018] 100 - Housing body; 101 - Mounting hole; 110 - Sub-battery compartment; 120 - Second battery compartment; 121 - First mounting part; 122 - Second mounting part; 130 - Electrical compartment; 131 - Mounting body; 140 - Second partition beam; 150 - First partition beam; 160 - Third partition beam; 170 - Liquid cooling plate;

[0019] 200-battery pack. Detailed Implementation

[0020] This application discloses a battery housing so that when multiple battery packs are installed, the structural strength of the battery housing can meet the requirements and reduce the resonance intensity under vibration conditions.

[0021] This application also discloses a battery pack having the above-described battery housing.

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] like Figures 1-3 As shown in the figure, this application discloses a battery case, which includes a case body 100. Typically, the top of the case body 100 is open to facilitate the installation of the battery pack 200. The battery case usually also includes a battery cover plate, which is fixed to the case body 100 to close the opening of the case body 100, so that the battery pack 200 is sealed inside the battery case.

[0024] The battery enclosure 100 includes a first battery compartment and a second battery compartment 120 arranged along a first direction, separated by a first partition beam 150. Corresponding battery packs 200 are installed within the first and second battery compartments 120. The battery enclosure provides installation space for the battery packs 200, the BMS (Battery Management System), electrical connection components, etc., and through a reasonable structural design, fixes these components within the battery enclosure, ensuring they maintain a relatively stable position during battery pack operation and preventing damage or loosening of connections due to vibration, impact, or other factors.

[0025] The battery casing can be cast from materials such as steel and aluminum alloy, or lightweight materials such as glass fiber reinforced composite materials and carbon fiber reinforced composite materials. The shape of the battery casing can be cylindrical, cuboid, cube, etc.

[0026] The first battery compartment includes at least two sub-battery compartments 110 arranged along a second direction, each sub-battery compartment 110 being separated by a second partition beam 140. The first direction and the second direction are not parallel. For example, the first direction and the second direction may be perpendicular. It should be noted that the first direction and the second direction may also not be perpendicular, for example, they may be between 70° and 90°.

[0027] Both the first battery compartment and the second battery compartment 120 are used to place battery packs, which include multiple individual cells. The arrangement direction of the individual cells in the first battery compartment is not parallel to that in the second battery compartment 120, so as to increase the battery stacking capacity per unit area of ​​the battery box.

[0028] The battery housing disclosed in this application includes a first battery compartment and a second battery compartment 120, which are arranged along a first direction. The first battery compartment is divided into multiple sub-battery compartments 110 by a second partition beam 140, and each sub-battery compartment 110 is arranged along a second direction. The arrangement direction of the first and second battery compartments 120 is different from the arrangement direction of the sub-battery compartments 110 within the first battery compartment. When a large number of battery packs 200 need to be arranged in the battery housing, a large number of sub-battery compartments 110 along the second direction of the first battery compartment are required, which would result in a larger size of the battery housing along the second direction. This application provides a second battery compartment 120 along one side of the first battery compartment along the first direction. With the same number of battery packs 200, this arrangement can reduce the size of the battery housing along the second direction, making it easier to ensure the structural strength of the battery housing. A first partition beam is provided between the first and second battery compartments 120, which can also increase the strength of the battery housing and reduce the resonance intensity under vibration conditions.

[0029] In one specific embodiment of this application, the arrangement direction of the individual cells in the second battery compartment 120 is parallel to a second direction, and the arrangement direction of the individual cells in the sub-battery compartment 110 is parallel to a first direction. The arrangement direction of the individual cells in the second battery compartment 120 refers to the stacking direction of the individual cells of the battery pack 200 within the second battery compartment 120. The individual cells of the battery pack 200 within the second battery compartment 120 are arranged along the second direction, that is, the arrangement direction of the individual cells of the battery pack 200 within the second battery compartment 120 is parallel to the arrangement direction of the sub-battery compartments 110 of the first battery compartment.

[0030] The arrangement direction of the individual cells in the sub-battery compartment 110 refers to the stacking direction of the individual cells of the battery pack 200 within the sub-battery compartment 110. The individual cells of the battery pack 200 within the sub-battery compartment 110 are arranged along a first direction, that is, the arrangement direction of the individual cells of the battery pack 200 within the sub-battery compartment 110 is parallel to the arrangement direction of the first battery compartment and the second battery compartment 120.

[0031] This design reduces the size occupied by the second battery compartment 120 along the first direction, ensuring that even if a second battery compartment 120 is added to one side of the first battery compartment along the first direction, the size of the battery pack along the first direction will not significantly increase, preventing a decrease in strength due to excessive size of the battery pack along the first direction. Furthermore, the first partition beam 150 between the first and second battery compartments 120 ensures that adding the second battery compartment 120 will not reduce the strength of the battery pack in the first direction.

[0032] In this embodiment, the housing body 100 includes a base plate, and both the first battery compartment and the second battery compartment 120 are formed on the base plate, that is, the base plate constitutes the bottom wall of the first battery compartment and the second battery compartment 120. The projected area of ​​the second battery compartment 120 on the base plate is smaller than the projected area of ​​the first battery compartment on the base plate. This embodiment can be understood as adding a smaller-area second battery compartment 120 to the traditional battery compartment (i.e., the first battery compartment), increasing the battery capacity without significantly reducing the strength of the battery housing. In other words, while maintaining the same battery capacity, adding a smaller-area second battery compartment 120 to the traditional battery compartment (i.e., the first battery compartment) makes it easier to improve the strength of the battery housing by adding corresponding partition beams.

[0033] In one specific embodiment of this application, along the second direction, the ratio of the size of the second battery compartment 120 to the size of the first battery compartment is 0.5 to 0.9. For example, the ratio can be 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, etc. In this embodiment, selecting the ratio within the range of 0.5 to 0.9 avoids the problem of excessively small ratios leading to large shear forces and poor structural strength at the connection point between the two battery compartments; it also avoids the problem of excessively large ratios causing interference with other vehicle components.

[0034] In one specific embodiment of this application, the dimension of the second battery compartment 120 along the second direction is smaller than the dimension of the first battery compartment along the second direction. That is, along the second direction, the dimension of the second battery compartment 120 is smaller than the dimension of the first battery compartment. This arrangement ensures that increasing the size of the second battery compartment 120 will not increase the dimension of the battery pack along the second direction.

[0035] In one specific embodiment of this application, one end of the second partition beam 140 is connected to the first partition beam 150. In this embodiment, the interconnection of the first partition beam 150 and the second partition beam 140 forms a stable frame structure. The first partition beam 150 and the second partition beam 140 can resist forces from different directions, resisting lateral forces generated during vehicle turning and lane changing, preventing the battery box from deforming under these forces. They can also effectively withstand the longitudinal forces generated during vehicle acceleration and deceleration, as well as the impact forces transmitted to the battery box from road bumps, ensuring that the battery box maintains a stable shape and structural integrity under these conditions, thereby greatly enhancing the overall strength of the battery box.

[0036] Furthermore, when the battery box is subjected to external impact or localized pressure, the interconnected structure of the first partition beam 150 and the second partition beam 140 can quickly disperse these forces across the battery box frame. For example, in the event of a vehicle collision or impact with a stone, the impact force will not be concentrated at a single point or in a localized area, but will be distributed to various parts of the battery box through the transmission of the first partition beam 150 and the second partition beam 140. This avoids damage to the battery box caused by excessive localized stress, improves the battery box's ability to withstand localized forces, and extends the battery box's service life.

[0037] During vehicle operation, uneven road surfaces cause vibrations that are transmitted to the battery pack. The structure connecting the first partition beam 150 and the second partition beam 140 alters the vibration transmission path and, due to its inherent stiffness and damping characteristics, dissipates some of the vibration energy. For example, when vibration is transmitted from the vehicle frame to the battery housing, the connection structure of the first partition beam 150 and the second partition beam 140 buffers and attenuates the vibration, reducing its direct impact on the battery pack 200 and ensuring its stability and reliability.

[0038] Furthermore, the surface of the first partition beam 150 can be parallel to the second direction, and the surface of the second partition beam 140 can be parallel to the first direction. When the first and second directions are perpendicular, the surface of the first partition beam 150 and the surface of the second partition beam 140 are perpendicular to each other.

[0039] In one specific embodiment of this application, the plane of symmetry of the first battery compartment along the first direction is coplanar with the plane of symmetry of the second battery compartment 120 along the first direction. That is, the overall structure composed of the first battery compartment and the second battery compartment 120 is symmetrical. In other words, along the second direction, the second battery compartment 120 is located in the middle of one side of the first battery compartment.

[0040] In this embodiment, the added second battery compartment 120 is positioned in the middle of one side of the first battery compartment, resulting in a more uniform weight distribution and distributing pressure over a larger structural area. This avoids excessive local stress, reduces the risk of structural damage due to stress concentration, and extends the overall lifespan of the battery pack. Adding the second battery compartment 120 changes the center of gravity of the entire battery pack. Positioning it in the middle of one side of the first battery compartment helps adjust the center of gravity, bringing it closer to the structural center. This ensures a more balanced distribution of gravity across different parts when the battery pack vibrates or is subjected to external forces, reducing uneven local stress caused by center of gravity shift and enhancing structural stability.

[0041] The main body 100 also includes an electrical compartment 130. Along the first direction, the electrical compartment 130 and the second battery compartment 120 are located on both sides of the first battery compartment. In this embodiment, arranging the electrical compartment 130 and the second battery compartment 120 on both sides of the first battery compartment allows for clear and reasonable functional zoning of the internal space of the battery compartment, resulting in a more uniform and symmetrical weight distribution within the battery compartment. This symmetrical layout helps balance the forces borne by the battery compartment in various directions, reducing local stress concentration caused by uneven weight distribution. When the battery pack is subjected to external impacts or vibrations, it can better maintain the stability of the overall structure, reducing the risk of deformation or damage to the battery compartment due to uneven stress.

[0042] During maintenance and repair, the second battery compartment 120 and the electrical compartment 130 are respectively arranged on both sides of the first battery compartment, so that each compartment has a relatively independent operating space. Maintenance personnel can more easily access and operate the components in each compartment without worrying about mutual interference. For example, when checking the battery status, replacing electrical components, or repairing the wiring, one compartment can be worked on independently without affecting the normal operation of other compartments, reducing maintenance difficulty and shortening maintenance time.

[0043] Along the second direction, the dimensions of the electrical compartment 130 are the same as those of the first battery compartment. This maintains the consistency between the electrical compartment 130 and the first battery compartment. The electrical compartment 130 and the first battery compartment are separated by a third partition beam 160, for example, by setting the third partition beam 160 inside the battery box to separate the first battery compartment and the electrical compartment 130. Since their dimensions are the same in the second direction, it is more convenient to separate the electrical compartment 130 within a rectangular compartment by setting the third partition beam 160.

[0044] In one specific embodiment of this application, a battery compartment mounting portion is provided on the wall of the second battery compartment 120. It should be noted that mounting holes 101 are also provided on both sides of the first battery compartment along the second direction, and a mounting body 131 can also be provided on the side of the electrical compartment 130 away from the first battery compartment.

[0045] In one specific embodiment of this application, the battery compartment mounting portion on the compartment wall of the second battery compartment 120 includes a first mounting portion 121 and a second mounting portion 122. There are two first mounting portions 121, and along the second direction, the two first mounting portions 121 are respectively arranged on both sides of the second battery compartment 120. There is at least one second mounting portion 122, and both are arranged on the side of the second battery compartment 120 away from the first battery compartment.

[0046] In this embodiment, mounting parts are provided on the other three sides of the second battery compartment 120, excluding the first partition beam 150. Combined with the mounting body 131 on the electrical compartment 130, this ensures that each side of the entire battery box is provided with a mounting structure. These mounting structures are used to stably install the battery pack in the corresponding position on the vehicle, thereby improving the reliability and stability of the battery pack installation.

[0047] Furthermore, the two first mounting portions 121 can be a separate structure, meaning they are two unconnected components, each fixed to one side of the second battery compartment 120. It should be noted that the two first mounting portions 121 can also be connected as one unit via a U-shaped component, where they are two parts of a single mounting element, with the U-shaped component supporting the lower side of the second battery compartment 120. This U-shaped connection improves the structural strength of the second battery compartment 120, preventing breakage due to shear forces between the first mounting portions 121 and the second battery compartment 120.

[0048] In one specific embodiment of this application, the battery housing may further include a liquid cooling plate 170, which is disposed on the bottom plate of the housing body 100, or the bottom plate of the housing body 100 may be a liquid cooling plate 170. The liquid cooling plate 170 is used for heat exchange with the battery pack 200 to regulate the temperature of the battery pack 200. The liquid cooling plate 170 has heat exchange channels, specifically, the shape of which can be U-shaped, U-shaped, or S-shaped, etc. The liquid cooling plate 170 can be made of a material with a certain hardness and strength (such as stainless steel). This makes the liquid cooling plate 170 less prone to deformation when the battery cell is subjected to compression or impact, allowing the battery cell to have higher structural strength and improved safety performance. The liquid cooling plate 170 can be made of various materials, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, etc. The liquid cooling plate 170 can also be made of nylon, plastic, etc.

[0049] The liquid cooling plate 170 is typically equipped with a corresponding heat exchange section for each battery pack 200. Each heat exchange section includes an inlet liquid zone and a return liquid zone. The inlet liquid zone includes an inlet liquid heat exchange channel, and the return liquid zone includes a return liquid heat exchange channel. The first end of the inlet liquid heat exchange channel is connected to the inlet liquid manifold, the second end of the inlet liquid heat exchange channel is connected to the first end of the return liquid heat exchange channel, and the second end of the return liquid heat exchange channel is connected to the return liquid manifold, thereby forming a loop for the circulation of the heat exchange medium.

[0050] It should be noted that the battery packs 200 in both the first and second battery compartments 120 are equipped with corresponding heat exchange sections.

[0051] The first and second battery compartments 120 can share a single liquid cooling plate 170. Each liquid cooling plate 170 has heat exchange sections arranged at positions corresponding to the first and second battery compartments 120 to exchange heat with the battery packs 200 within the compartment. The heat exchange sections are not limited to a one-to-one correspondence with each battery pack 200. Figure 2 Taking the illustrated scheme as an example, the number of heat exchange sections can be the same as the number of sub-battery compartments in the first battery compartment, that is, each sub-battery compartment corresponds to one heat exchange section, and the heat exchange section extends into the second battery compartment 120. The heat exchange section corresponding to each sub-battery compartment simultaneously exchanges heat with some of the batteries in the first battery compartment, thus reducing the number of heat exchange sections and facilitating the arrangement of heat exchange channels.

[0052] Two liquid cooling plates 170 can also be provided, and arranged corresponding to the first battery compartment and the second battery compartment 120 respectively. That is, in this embodiment, the first battery compartment is provided with one liquid cooling plate 170 and the second battery compartment 120 is provided with one liquid cooling plate 170. The two liquid cooling plates 170 can be controlled independently or connected in parallel for unified control. This embodiment does not limit the connection method of the two liquid cooling plates 170.

[0053] In one specific embodiment of this application, the area ratio of the second battery compartment 120 to the first battery compartment (this area ratio is the projected area of ​​the two battery compartments on the bottom plate of the housing body) is 0.1 to 0.4. For example, the area ratio of the second battery compartment 120 to the first battery compartment can be 0.1, 0.13, 0.15, 0.17, 0.2, 0.24, 0.28, 0.32, 0.36, 0.4, etc.

[0054] Those skilled in the art can reasonably select the area ratio of the second battery compartment 120 and the first battery compartment based on the total capacity of the battery pack, so as to arrange more individual batteries in the first battery compartment and arrange a small number of individual batteries in the second battery compartment 120, so as to minimize changes in the size of the battery box along the first direction and prevent significant changes in the shape of the battery box from affecting its arrangement on the vehicle.

[0055] This application also discloses a battery pack, which includes a battery housing and a battery pack 200. The battery housing is the same as that disclosed in the above embodiment. The battery pack 200 is disposed in both the first battery compartment and the second battery compartment 120. Because the battery pack disclosed in this application has the aforementioned battery housing, it possesses all the technical effects of the aforementioned battery housing, which will not be elaborated upon further here.

[0056] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0057] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0059] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A battery case characterized by comprising: The enclosure includes a main body (100), which includes a first battery compartment and a second battery compartment (120) arranged along a first direction. The first battery compartment and the second battery compartment (120) are separated by a first partition beam (150). The first battery compartment includes at least two sub-battery compartments (110) arranged along a second direction. Each of the sub-battery compartments (110) is separated by a second partition beam (140). The first direction is not parallel to the second direction. Both the first battery compartment and the second battery compartment (120) are used to place battery packs, which include multiple individual cells. The arrangement direction of the individual cells in the first battery compartment is not parallel to the arrangement direction of the individual cells in the second battery compartment (120).

2. The battery pack of claim 1, wherein, The arrangement direction of the individual cells in the second battery compartment (120) is parallel to the second direction, and the arrangement direction of the individual cells in the sub-battery compartment (110) is parallel to the first direction.

3. The battery housing as described in claim 1, characterized in that, The first direction is perpendicular to the second direction.

4. The battery pack of claim 1, wherein, The housing body (100) includes a base plate, and the first battery compartment and the second battery compartment (120) are both formed on the base plate; The projected area of ​​the second battery compartment (120) on the base plate is smaller than the projected area of ​​the first battery compartment on the base plate.

5. The battery pack of claim 1, wherein, Along the second direction, the ratio of the size of the second battery compartment (120) to the size of the first battery compartment is 0.5 to 0.

9.

6. The battery pack of claim 1, wherein, The second battery compartment (120) has a smaller dimension along the second direction than the first battery compartment.

7. The battery pack of claim 1, wherein, One end of the second partition beam (140) is connected to the first partition beam (150).

8. The battery pack of claim 1, wherein, The surface of the first partition beam (150) is parallel to the second direction, and the surface of the second partition beam (140) is parallel to the first direction.

9. The battery pack of claim 1, wherein, The first battery compartment is symmetrical about the plane along the first direction, and the second battery compartment (120) is symmetrical about the plane along the first direction.

10. The battery pack of claim 1, wherein, The housing body (100) also includes an electrical compartment (130), and along the first direction, the electrical compartment (130) and the second battery compartment (120) are located on both sides of the first battery compartment.

11. The battery housing as described in claim 10, characterized in that, Along the second direction, the electrical compartment (130) is the same size as the first battery compartment.

12. The battery housing as described in claim 1, characterized in that, The second battery compartment (120) has a battery compartment mounting part on its compartment wall.

13. The battery pack of claim 12, wherein, The battery compartment mounting part includes a first mounting part (121) and a second mounting part (122). There are two first mounting parts (121), and along the second direction, the two first mounting parts (121) are respectively arranged on both sides of the second battery compartment (120). There is at least one second mounting part (122), and both are arranged on the side of the second battery compartment (120) away from the first battery compartment.

14. The battery pack of claim 13, wherein, The two first mounting parts (121) are separate structures and are respectively fixed on both sides of the second battery compartment (120); or, The two first mounting parts (121) are connected as one unit by a U-shaped member, which supports the lower side of the second battery compartment (120).

15. The battery pack of claim 1, wherein, The housing body (100) includes a base plate, on which a liquid cooling plate (170) is provided, or the base plate is the liquid cooling plate (170).

16. The battery pack of claim 15, wherein, The first battery compartment and the second battery compartment (120) share a liquid cooling plate (170). or, There are two liquid cooling plates (170), which are respectively arranged corresponding to the first battery compartment and the second battery compartment (120).

17. The battery pack of any one of claims 1-16, wherein, The area ratio of the second battery compartment (120) to the first battery compartment is 0.1 to 0.

4.

18. A battery pack, characterized by, It includes a battery housing and a battery pack (200), wherein the battery housing is the battery housing as described in any one of claims 1-17, and the battery pack (200) is provided in both the first battery compartment and the second battery compartment (120).

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