Battery pack

Abstract

The utility model provides a battery pack and belongs to the field of secondary batteries. The battery pack comprises a box body, a battery cell module and a heat exchange side plate, the battery cell module and the heat exchange side plate are arranged in the box body, the heat exchange side plate is internally provided with a flow channel for a heat exchange medium to flow, the heat exchange side plate is further provided with a liquid inlet and a liquid outlet which are communicated with the flow channel, the liquid inlet and the liquid outlet of the heat exchange side plate are located at the rear end of the heat exchange side plate, and the liquid inlet and the liquid outlet are both connected with a heat exchange pipeline. And the heat exchange pipeline is positioned between the rear end of the battery cell module and the rear side wall of the box body. According to the utility model, the heat exchange pipeline is arranged between the rear end of the battery cell module and the rear end of the box body, so that the leakage of a heat exchange medium caused by the damage of the heat exchange pipeline after collision is avoided, the recoverability of the battery cell is ensured, and the impact influence is prevented from being further expanded.

Description

TECHNICAL FIELD

[0001] The utility model belongs to secondary battery field, and particularly relates to a battery pack. BACKGROUND

[0002] The battery pack of new energy automobile generally includes a box body and a battery cell module arranged in the box body, the battery cell module includes a battery cell group composed of a plurality of battery cells arranged in a longitudinal direction and end plates located at longitudinal two ends of the battery cell group, in order to ensure that the battery cells can work at a suitable temperature and ensure a long service life of the battery pack, a heat exchange side plate is further arranged on a transverse side of the battery cell group to timely absorb heat when the battery cells generate more heat and ensure temperature stability in the battery pack.

[0003] The heat exchange medium in the heat exchange side plate needs to circulate to ensure continuous and effective heat dissipation or heating of the battery cells, so at least one liquid inlet pipe and at least one liquid outlet pipe are required for each heat exchange side plate, and an adapter is fixed on the battery pack box body and penetrates the inside and outside of the battery pack box body, the adapter can connect the liquid inlet pipe inside the battery pack box body with the liquid inlet pipe outside the box body and connect the liquid outlet pipe inside the battery pack box body with the liquid outlet pipe outside the box body, and the adapter facilitates the connection of the pipeline by the operator under the premise of ensuring the sealing of the battery pack box body.

[0004] The longitudinal side of the battery pack is close to the shell of the new energy automobile, and this side is the front side of the battery pack. A plurality of connector joints are arranged on the front side wall of the battery pack box body to facilitate the connection of various lines for signal transmission and power transmission by assembly and maintenance personnel. The above-mentioned adapter is also arranged on the front side wall of the battery pack box body for easy operation. In the case of arranging a plurality of heat exchange side plates, distribution pipes for distributing heat exchange medium to each heat exchange side plate and collection pipes for collecting heat exchange medium from each heat exchange side plate are required. In addition to the distribution pipes and the collection pipes, some battery pack box bodies are also provided with connection pipes for connecting the heat exchange side plates in series. The heat exchange pipes such as the distribution pipes, the collection pipes and the connection pipes are usually arranged between the front ends of the battery cell modules and the front side wall of the battery pack box body.

[0005] For example, a side liquid cooling side plate type energy storage lithium battery module is disclosed in a Chinese utility model patent with the authorization announcement number CN221041249U and the authorization announcement date of May 28, 2024, the module includes a box body and an upper cover for closing the box body, a first mounting plate and a second mounting plate are arranged on the front side of the box body, various connector joints are arranged on the first mounting plate and the second mounting plate, a plurality of battery modules are arranged in the box body, liquid cooling side plates are arranged between adjacent battery modules, each liquid cooling side plate is connected with a heat exchange pipe, and the liquid cooling pipe is located between the front side of the battery module and the front side wall of the box body.

[0006] The structure has disadvantages, when the new energy vehicle using the battery pack collides, if the impact position is near the battery pack, the front end of the battery pack is very easy to be impacted and deformed, after the deformation of the battery pack, the heat exchange pipelines such as the distribution pipe, the collection pipe and the connecting pipe are easy to be squeezed and broken or pierced by various joints, so that the internal heat exchange medium leaks. The leakage of the heat exchange medium will cause the short circuit of the battery cell, so that the battery cell cannot be recycled and reused, and even the battery cell will catch fire and cause a fire, which aggravates the severity of the accident.

[0007] To solve the above technical problems, the person skilled in the art can easily think of setting a reinforcing structure on the front side wall of the box body to prevent the deformation of the box body, or setting a foam or other buffer structure between the front end of the battery cell module and the front side wall of the box body to absorb the impact energy.

[0008] For the scheme of setting the reinforcing structure, the existing Chinese utility model patent with the authorization announcement number CN219246845U and the authorization announcement date of June 23, 2023 discloses a battery pack shell, in order to prevent the deformation caused by the impact from causing the heat exchange side plate and the heat exchange pipeline to be broken and causing the heat exchange medium to leak, the battery pack shell is provided with a reinforcing frame (i.e. the reinforcing structure) on the outside of the shell body, the reinforcing frame is composed of a plurality of horizontal beams and vertical beams, but the reinforcing frame not only increases the weight of the shell body and increases the manufacturing cost, but also increases the size of the shell body, which is difficult to apply in new energy vehicles with requirements for the size and weight of the shell body.

[0009] For the scheme of setting the buffer structure, since the buffer structure such as foam has compressibility, the thickness of the buffer structure is insufficient to effectively prevent the heat exchange pipelines such as the distribution pipe, the collection pipe and the connecting pipe from being broken; if the thickness of the buffer structure is increased, the overall size of the battery pack will be increased, which cannot meet the use requirements. Utility model content

[0010] The utility model aims at providing a battery pack to solve the technical problem that the heat exchange pipelines such as the distribution pipe, the collection pipe and the connecting pipe are easy to be broken and cause the heat exchange medium to leak when the battery pack is impacted in the prior art.

[0011] To achieve the above-mentioned purpose, the technical scheme of the battery pack provided by the utility model is:

[0012] A battery pack comprises a box body and a battery cell module and a heat exchange side plate arranged in the box body, the heat exchange side plate is provided with a flow channel for the flow of a heat exchange medium, the heat exchange side plate is further provided with a liquid inlet and a liquid outlet in communication with the flow channel, the liquid inlet and the liquid outlet of the heat exchange side plate are located at the rear end of the heat exchange side plate, the liquid inlet and the liquid outlet are both connected with a heat exchange pipeline, and the heat exchange pipeline is located between the rear end of the battery cell module and the rear side wall of the box body.

[0013] As a further improvement, two heat exchange joints are arranged on the front side wall of the box body and penetrate the front side wall of the box body, and a conveying channel for conveying the heat exchange medium is arranged in the box body or the wall of the box body, one end of the conveying channel being connected with the heat exchange joint and the other end being connected with a heat exchange pipeline.

[0014] As a further improvement, the battery pack further comprises a heat exchange bottom plate arranged in the box body and attached to the bottom of the battery cell module to cool the bottom of the battery cell module, and the conveying channel is a cavity provided in the heat exchange bottom plate for the heat exchange medium to flow, the heat exchange joint is connected with the front end of the heat exchange bottom plate and communicates with the cavity, and the heat exchange pipeline is connected with the rear end of the heat exchange bottom plate and communicates with the cavity.

[0015] As a further improvement, the heat exchange joint comprises a fixed part and a connecting part, the connecting part penetrates the front side wall of the box body and is sealingly fitted with the front side wall of the box body, and the fixed part is fixedly connected with the heat exchange bottom plate, the cross-sectional size of the fixed part being larger than that of the connecting part.

[0016] As a further improvement, the box body comprises a box side wall and a box top wall fixed to the upper end of the box side wall, the heat exchange bottom plate is fixed to the lower end of the box side wall and constitutes a box bottom wall, and the conveying channel is a cavity provided in the box bottom wall for the heat exchange medium to flow, the heat exchange joint is connected with the front end of the box bottom wall and communicates with the cavity, and the heat exchange pipeline is connected with the rear end of the box bottom wall and communicates with the cavity.

[0017] As a further improvement, the heat exchange joint comprises a fixed part and a connecting part, the connecting part penetrates the front side wall of the box body and is sealingly fitted with the front side wall of the box body, and the fixed part is fixedly connected with the heat exchange bottom plate, the cross-sectional size of the fixed part being larger than that of the connecting part.

[0018] As a further improvement, the two heat exchange joints are respectively arranged at the lower positions of the left and right ends of the front side wall of the box body.

[0019] As a further improvement, a buffer body is arranged between the rear end of the battery cell module and the rear side wall of the box body, and the heat exchange pipeline is arranged in the buffer body.

[0020] As a further improvement, the box body comprises an upper box body and a lower box body which are coupled together, the rear side of the lower box body is in an open structure, and the rear side wall of the upper box body extends downward to form a closure plate for closing the rear side of the lower box body.

[0021] As a further improvement, the upper turning edge is arranged at the lower side opening edge of the upper box body and the edge of the closing plate, the lower turning edge is arranged at the upper side opening edge of the lower box body and the edge of the open structure, the connecting holes for mounting bolts are arranged on the upper turning edge and the lower turning edge, the sealing structure is arranged between the upper turning edge and the lower turning edge, and the upper turning edge at the lower side opening edge of the upper box body is correspondingly matched with the lower turning edge at the upper side opening edge of the lower box body, and the upper turning edge at the closing plate is correspondingly matched with the lower turning edge at the open structure.

[0022] The battery pack provided by the utility model belongs to an invention and creation of element change type. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the battery pack in the utility model;

[0024] Figure 2 FIG. 2 is a structural schematic diagram of the battery pack in the utility model;

[0025] Figure 3 FIG. 3 is a structural schematic diagram of the battery pack in the utility model;

[0026] Figure 4 FIG. 4 is a structural schematic diagram of the battery pack in the utility model;

[0027] Figure 5 FIG. 5 is a structural schematic diagram of the battery pack in the utility model;

[0028] Figure 6 FIG. 6 is a structural schematic diagram of the battery pack in the utility model.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, upper box body; 11, closing plate; 12, upper turning edge; 2, lower box body; 21, pipeline connecting wall; 22, lower turning edge; 3, electric core module; 31, electric core; 32, end plate; 4, heat exchange side plate; 41, cold plate main body; 42, first cold plate current collector; 43, second cold plate current collector; 44, liquid inlet; 5, heat exchange bottom plate; 6, heat exchange pipeline; 61, distribution pipe; 62, connecting pipe; 63, collecting pipe; 7, heat exchange joint; 71, connecting part; 72, fixing part. DETAILED DESCRIPTION

[0031] The utility model will be described in further detail below in combination with embodiments.

[0032] To solve the problems in the prior art, the basic concept of the utility model is that the liquid inlet and the liquid outlet of the heat exchange side plate are both arranged at the rear end of the heat exchange side plate, so that the heat exchange pipeline connected with the liquid inlet and the liquid outlet is located between the rear end of the electric core module and the rear side wall of the box, thereby avoiding the leakage of the heat exchange medium caused by the damage of the heat exchange pipeline after the impact, ensuring the recyclability of the electric core and preventing the impact from further expanding.

[0033] Specific embodiment 1 of the battery pack provided by the utility model:

[0034] A battery pack, referring to the accompanying drawings, Figure 1 , comprising a box body, an electric core module 3, a heat exchange side plate 4, a heat exchange bottom plate 5 and a heat exchange pipeline 6. The box body is composed of an upper box body 1 and a lower box body 2 that can be buckled together in one embodiment, and the box body can also be composed of a box main body with an open upper end and an upper end cover closing the upper end of the box main body in another embodiment.

[0035] The electric core module 3 is located in the box body, referring to the accompanying drawings, Figure 2 The electric core module 3 comprises an electric core group composed of a plurality of electric cores 31 arranged in the front-rear direction and end plates 32 located at the front and rear ends of the electric core group, and structural glue is arranged between adjacent electric cores 31 in the electric core group and between the end plates 32 and the adjacent electric cores 31. The outer side of the electric core module 3 is also bundled with a binding tape to maintain good integrity of the electric core module 3.

[0036] Referring to the accompanying drawings, Figure 1 and the accompanying drawings, Figure 5Multiple connectors are installed through the front wall of the enclosure, forming a pipeline connection wall 21. These connectors connect to the battery cell 31 or other components within the enclosure via wires to transmit signals and electrical energy. Alternatively, wires and cables can extend directly through the front wall of the enclosure to the outside. Two heat exchange joints 7 are also installed through the pipeline connection wall 21. These joints are located at the lower left and right ends of the front wall, close to the sides and bottom of the enclosure, providing strong impact resistance. The heat exchange joints 7 are sealed to the pipeline connection wall 21. The end of the heat exchange joint 7 outside the enclosure connects to the pipeline of the heat exchange system, while the end inside the enclosure connects to the delivery channel. Positioning the heat exchange joints 7 at the front of the enclosure facilitates connection to the heat exchange medium circulation system and allows for easy maintenance by personnel.

[0037] A heat exchange side plate 4 is provided on the left, right, or both sides of the battery cell module 3. The number of heat exchange side plates 4 can be selected as needed. The heat exchange side plates 4 are fixedly connected to the corresponding battery cell module 3 by thermally conductive structural adhesive. See appendix. Figure 1 In this embodiment, there are two heat exchange side plates 4, see attached diagram. Figure 3 and attached Figure 4 The heat exchange side plate 4 includes a cold plate body 41, a first cold plate collector 42 located at the rear end of the cold plate body 41, and a second cold plate collector 43 located at the front end of the cold plate body 41. The cold plate body 41 is a harmonica tube with two flow channels extending in the front-rear direction. Both the first and second cold plate collectors 42 and 43 are welded and fixed to the cold plate body 41. The first cold plate collector 42 is provided with an inlet 44 and an outlet, located on the left and right sides of the first cold plate collector 42, respectively. The first cold plate collector 42 has two channels, one for connecting the inlet 44 to one flow channel in the cold plate body 41, and the other for connecting the outlet to the other flow channel in the cold plate body 41. The second cold plate collector 43 has a U-shaped channel for connecting the two flow channels in the cold plate body 41.

[0038] Heat exchanger pipe 6 is also located inside the casing; see appendix. Figure 2 The heat exchange pipeline 6 includes two collecting pipes 63, one distributing pipe 61, and one connecting pipe 62. The two collecting pipes 63 are respectively connected to the liquid outlets of the two heat exchange side plates 4. The distributing pipe 61 is connected to the liquid inlet 44 of one of the heat exchange side plates 4. The first cold plate current collector 42 of the heat exchange side plate 4 connected to the distributing pipe 61 is also provided with an outlet for discharging the heat exchange medium that enters the first cold plate current collector 42 but does not enter the cold plate body 41. The outlet is located on the side of the first cold plate current collector 42 facing the other heat exchange side plate 4. The connecting pipe 62 connects the outlet and the liquid inlet 44 on the other heat exchange side plate 4. A space is left between the rear end of the battery module 3 and the rear side wall of the housing, and the heat exchange pipeline 6 is located in this space.

[0039] The conveying channel is divided into a liquid inlet conveying channel and a liquid outlet conveying channel, and the two heat exchange joints 7 are liquid inlet joints and liquid outlet joints for liquid inlet and liquid outlet respectively, wherein the liquid inlet joints are connected with the liquid inlet conveying channel, and the liquid outlet joints are connected with the liquid outlet conveying channel. One end of the collecting pipe 63 away from the corresponding heat exchange side plate 4 is connected with the liquid outlet conveying channel, and one end of the distribution pipe 61 away from the corresponding heat exchange side plate 4 is connected with the liquid inlet conveying channel. The heat exchange medium enters the liquid inlet conveying channel through the liquid inlet joint, then enters one heat exchange side plate 4 through the distribution pipe 61, part of the heat exchange medium flows in the heat exchange side plate 4, and the other part of the heat exchange medium reaches the other heat exchange side plate 4 through the connecting pipe 62. After the heat exchange medium flows out of the heat exchange side plate 4, it enters the liquid outlet conveying channel through the collecting pipe 63, and is finally discharged by the liquid outlet joint.

[0040] In the case of a collision of the vehicle and the position of the collision is near the battery pack, if the collision degree is light, only the front side wall of the box body is deformed inwardly, and since there is a gap between the front side wall of the box body and the front end of the battery cell module 3, the battery cell module 3 will not be damaged before the front side wall of the box body touches the battery cell module 3. Since the heat exchange pipeline 6 is not in front of the battery cell module 3, the heat exchange pipeline 6 will not be cracked by the deformed front side wall of the box body or pierced by the connector or adapter, and there will be no problem of leakage of the heat exchange medium. In this case, all the battery cells 31 can be recycled and reused.

[0041] In this embodiment, referring to Figs. 1 and 2, the box body comprises a box side wall and a box top wall fixed to the upper end of the box side wall, and the heat exchange bottom plate 5 is fixed to the lower end of the box side wall to form a box bottom wall. The heat exchange bottom plate 5 not only can cool the battery cell module 3, but also can support the box body as a part of the box body, thus simplifying the structure. Figure 1

[0042] The heat exchange bottom plate 5 is provided with a cavity for the flow of the heat exchange medium, and the cavity is arranged zigzag in the heat exchange bottom plate 5, referring to Figs. 1 and 2. Figure 5 Figure 6 ​​The liquid inlet connector and the liquid outlet connector are fixedly connected with the heat exchange bottom plate 5 at one end of the box body and are communicated with the cavity in the heat exchange bottom plate 5, and the distribution pipe 61 and the collection pipe 63 are fixedly connected with the heat exchange bottom plate 5 and are communicated with the cavity. The path from the liquid inlet connector to the distribution pipe 61 in the cavity constitutes a liquid inlet conveying channel, and the path from the cavity to the liquid outlet connector through the collection pipe 63 constitutes a liquid outlet conveying channel. The heat exchange medium flows into the cavity from the liquid inlet connector, flows along the cavity to the distribution pipe 61, and then part of the heat exchange medium enters the distribution pipe 61, and the other part of the heat exchange medium continues to flow along the cavity. The heat exchange medium in the distribution pipe 61 flows through the heat exchange side plate 4 and then flows into the collection pipe 63, and the heat exchange medium in the collection pipe 63 reenters the cavity and flows along the cavity together with other heat exchange medium in the cavity to the liquid outlet connector and is discharged.

[0043] The heat exchange bottom plate 5 also functions to connect the liquid inlet connector and the distribution pipe 61 and to connect the liquid outlet connector and the collection pipe 63, and no connecting pipe 62 needs to be additionally arranged between the liquid inlet connector and the distribution pipe 61 and between the liquid outlet connector and the collection pipe 63, thereby simplifying the structure of the battery pack. In addition, the heat exchange bottom plate 5 has higher strength due to the support of the side wall of the box body, and the risk of leakage of the heat exchange medium caused by the additional arrangement of the pipe is further reduced.

[0044] The heat exchange connector 7 includes a fixed portion 72 and a connecting portion 71, the connecting portion 71 penetrates through the front side wall of the box body and is in sealing engagement with the front side wall of the box body, and the fixed portion 72 is fixedly connected with the heat exchange bottom plate 5. The heat exchange connector 7 is provided with an L-shaped inner hole, the heat exchange medium flows in the connecting portion 71 in the front-rear direction, and the heat exchange medium flows in the fixed portion 72 in the up-down direction. The cross-sectional dimension of the fixed portion 72 is larger than that of the connecting portion 71, so that the connecting portion 71 can be conveniently connected with the pipe of the heat exchange medium circulating system, and the fixed portion 72 has higher strength and can prevent damage of the heat exchange connector 7 when impact occurs.

[0045] The heat exchange connector 7 is generally a metal piece, and the heat exchange bottom plate 5 is also a metal piece, so the heat exchange connector 7 and the heat exchange bottom plate 5 are not easy to be damaged and leak the heat exchange medium. Therefore, in other embodiments, the heat exchange connector 7 can also be a pipe connector with an equal diameter and an L shape.

[0046] In the present embodiment, the heat exchange bottom plate 5 and the heat exchange side plate 4 can cool the battery cell modules 3 when the temperature is high, and can heat the battery cell modules 3 when the temperature is low, so as to maintain the temperature of the battery cell modules 3 stable.

[0047] In other embodiments, the heat exchange connector 7 can also be arranged at other positions of the front side wall of the box body or other side walls according to needs.

[0048] In other embodiments, the heat exchange side plate 4 can also take other forms. For example, the heat exchange side plate 4 can be composed of two parts that interlock in the left-right direction. Grooves are machined on the two parts, and the two parts are welded together after interlocking. At this time, the grooves form flow channels. The flow channels in the heat exchange side plate 4 can be U-shaped or W-shaped, and the beginning and end of the flow channels in the heat exchange side plate 4 must both be at the rear end.

[0049] Specific embodiment 2 of the battery pack provided by this utility model:

[0050] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that a buffer body is provided in the space between the rear end of the battery cell module and the rear side wall of the housing, and all heat exchange pipelines are located in the buffer body.

[0051] The installation of a buffer can absorb vibration, further protecting the heat exchange pipeline and preventing deformation of the heat exchange pipeline caused by factors such as vehicle bumps, thereby further reducing the risk of leakage of heat exchange medium from the heat exchange pipeline.

[0052] The buffer can be a foamed encapsulated body formed by foaming and potting, or it can be foam attached to the outside of the heat exchange pipeline.

[0053] Specific embodiment 3 of the battery pack provided by this utility model:

[0054] This embodiment is based on Embodiment 1, but differs in that the housing in this embodiment includes an upper housing 1 and a lower housing 2 that are interlocked together. The top wall of the upper housing 1 is the top wall of the housing, and the bottom wall of the lower housing 2 is the bottom wall of the housing, i.e., the heat exchange base plate 5. See Appendix Figure 1 and attached Figure 5 The rear side of the lower housing 2 is open, and the rear sidewall of the upper housing 1 extends downward to form a sealing plate 11 for closing the rear side of the lower housing 2. An upward-curved flange 12 is provided at the lower edge of the opening of the upper housing 1 and at the edge of the sealing plate 11, and a downward-curved flange 22 is provided at the upper edge of the opening of the lower housing 2 and at the edge of the open structure. The upward-curved flange 12 at the lower edge of the upper housing 1 corresponds to and engages with the downward-curved flange 22 at the upper edge of the lower housing 2, and the upward-curved flange 12 at the sealing plate 11 corresponds to and engages with the downward-curved flange 22 at the open structure. Both the upward-curved flange 12 and the downward-curved flange 22 have connecting holes for mounting bolts, and a sealing structure is also provided between the upward-curved flange 12 and the downward-curved flange 22 to achieve a good sealing effect at the joint between the upper housing 1 and the lower housing 2 after they are fastened together.

[0055] In this embodiment, the rear side of the lower cabinet 2 is in an open structure, so that the heat exchange pipeline 6 can be more conveniently assembled or overhauled. In addition, the lower flange 22 at the rear side of the lower cabinet 2 and the upper flange 12 at the rear side of the upper cabinet 1 can be arranged vertically to the front-rear direction, so that the upper flange 12 and the lower flange 22 have sufficient width to reduce the size of the cabinet in the front-rear direction under the condition of ensuring good sealing effect.

[0056] A specific embodiment 4 of the battery pack provided by the utility model is as follows:

[0057] The embodiment is based on the embodiment 1, and differs from the embodiment 1 in that, in the embodiment, the heat exchange bottom plate is not used as the cabinet bottom wall of the cabinet, the heat exchange bottom plate is an independent component, the cabinet also has another cabinet bottom wall, and the heat exchange bottom plate is fixed to the cabinet bottom wall in a manner of gluing.

[0058] A specific embodiment 5 of the battery pack provided by the utility model is as follows:

[0059] The embodiment is based on the embodiment 1, and differs from the embodiment 1 in that, in the embodiment, the liquid inlet connector is connected with the liquid inlet flow guide pipe extending in the front-rear direction, the liquid outlet connector is connected with the liquid outlet flow guide pipe extending in the front-rear direction, and the liquid inlet flow guide pipe and the liquid outlet flow guide pipe are respectively located in the internal corner of the cabinet at the connection position of the two side walls and the cabinet bottom wall, so that the cabinet is not easily deformed, and the liquid inlet flow guide pipe or the liquid outlet flow guide pipe can be prevented from being deformed and damaged.

[0060] In the embodiment, the liquid inlet flow guide pipe is also provided with a branch pipe, and the branch pipe is used for being communicated with the cavity of the heat exchange bottom plate. Similarly, the liquid outlet flow guide pipe is also provided with a branch pipe, and the branch pipe is used for being communicated with the cavity of the heat exchange bottom plate.

[0061] The heat exchange bottom plate has no influence on the arrangement of the heat exchange pipeline in the embodiment, so that the heat exchange bottom plate can also not be arranged in other embodiments of the embodiment.

[0062] A specific embodiment 6 of the battery pack provided by the utility model is as follows:

[0063] The embodiment is based on the embodiment 1, and differs from the embodiment 1 in that, in the embodiment, the liquid inlet connector and the liquid outlet connector are arranged at the rear side wall of the cabinet, and in the embodiment, the conveying channel can not be arranged, the heat exchange medium entering the liquid inlet connector can directly flow into the distribution pipe, and the heat exchange medium remaining in the collection pipe can also directly enter the liquid outlet connector.

[0064] Since the rear side of the cabinet is not affected by the impact, in other embodiments of the embodiment, the liquid inlet connector and the liquid outlet connector can also not be arranged, and the pipeline of the heat exchange medium circulating system can be directly introduced into the cabinet to be connected with the cooling pipeline.

[0065] The specific embodiment 7 of the battery pack provided by the utility model:

[0066] The difference between the embodiment and the embodiment 1 is that the liquid inlet conveying channel and the liquid outlet conveying channel in the embodiment are machined in the tank bottom wall, but the tank bottom wall is not used as a heat exchange bottom plate.

[0067] In different embodiments of the embodiment, a heat exchange bottom plate can be additionally provided or no heat exchange bottom plate is provided, when the heat exchange bottom plate is additionally provided, the heat exchange bottom plate is located between the tank bottom wall and the battery cell module.

[0068] In other embodiments, the liquid inlet conveying channel and the liquid outlet conveying channel can also be provided in the tank side wall, which is not described herein.

[0069] Finally, it should be noted that the above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified without creative labor, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A battery pack, characterized by, The battery pack comprises a box body, a battery cell module arranged in the box body, and a heat exchange side plate, a plurality of connectors are arranged through the front side wall of the box body and constitute a pipeline connecting wall, a gap capable of providing buffering is left between the front side wall of the box body and the front end of the battery cell module, a flow channel for the flow of a heat exchange medium is arranged in the heat exchange side plate, an inlet and an outlet of the flow channel are arranged on the heat exchange side plate, the inlet and the outlet are located at the rear end of the heat exchange side plate away from the pipeline connecting wall, and heat exchange pipelines are connected to the inlet and the outlet.

2. The battery pack of claim 1, wherein, Two heat exchange joints are arranged through the front side wall of the box body, and a conveying channel for conveying the heat exchange medium is arranged in the box body or the wall of the box body, one end of the conveying channel is connected to the heat exchange joint, and the other end is connected to the heat exchange pipeline.

3. The battery pack of claim 2, wherein, The battery pack further comprises a heat exchange bottom plate arranged in the box body and attached to the bottom of the battery cell module to cool the bottom of the battery cell module, the conveying channel is a cavity arranged in the heat exchange bottom plate for the flow of the heat exchange medium, the heat exchange joint is connected to the front end of the heat exchange bottom plate and communicates with the cavity, and the heat exchange pipeline is connected to the rear end of the heat exchange bottom plate and communicates with the cavity.

4. The battery pack of claim 3, wherein, The heat exchange joint comprises a fixed part and a connecting part, the connecting part penetrates through the front side wall of the box body and is in sealed fit with the front side wall of the box body, the fixed part is fixedly connected to the heat exchange bottom plate, and the cross-sectional dimension of the fixed part is larger than that of the connecting part.

5. The battery pack of claim 2, wherein, The box body comprises a box side wall, a box top wall fixed to the upper end of the box side wall, and a box bottom wall fixed to the lower end of the box side wall, the conveying channel is a cavity arranged in the box bottom wall for the flow of the heat exchange medium, the heat exchange joint is connected to the front end of the box bottom wall and communicates with the cavity, and the heat exchange pipeline is connected to the rear end of the box bottom wall and communicates with the cavity.

6. The battery pack of claim 5, wherein, The heat exchange joint comprises a fixed part and a connecting part, the connecting part penetrates through the front side wall of the box body and is in sealed fit with the front side wall of the box body, the fixed part is fixedly connected to the box bottom wall, and the cross-sectional dimension of the fixed part is larger than that of the connecting part.

7. The battery pack of any one of claims 2-6, wherein, The two heat exchange joints are respectively located at the lower positions of the left and right ends of the front side wall of the box body.

8. The battery pack of any one of claims 1-6, wherein, A buffer body is arranged between the rear end of the battery cell module and the rear side wall of the box body, and the heat exchange pipeline is located in the buffer body.

9. The battery pack of any one of claims 1-6, wherein, The box body comprises an upper box body and a lower box body which are buckled together, the rear side of the lower box body is in open structure, and the rear side wall of the upper box body extends downward to form a closing plate for closing the rear side of the lower box body.

10. The battery pack of claim 9, wherein, An upper turning edge is arranged at the edge of the lower side opening part of the upper box body and the edge of the closing plate, a lower turning edge is arranged at the edge of the upper side opening part of the lower box body and the edge of the open structure, connecting holes for mounting bolts are arranged on the upper turning edge and the lower turning edge, a sealing structure is further arranged between the upper turning edge and the lower turning edge, and the upper turning edge at the edge of the lower side opening part of the upper box body corresponds to the lower turning edge at the edge of the upper side opening part of the lower box body, and the upper turning edge at the edge of the closing plate corresponds to the lower turning edge at the edge of the open structure.

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