Battery pack and energy storage equipment

Abstract

The utility model provides a battery pack and energy storage equipment. The battery pack comprises a shell, a battery module, a battery management unit and a battery power distribution unit, an accommodating cavity is formed in the shell, and a first connecting part and a second connecting part are arranged on the shell; the battery module is arranged in the accommodating cavity, the battery module is electrically connected to an external high-voltage power supply through the first connecting part, and the battery module is electrically connected to an external low-voltage power supply through the second connecting part; the battery management unit is arranged in the accommodating cavity, is electrically connected with the battery module and is used for monitoring the charging and discharging states of the battery module; the battery power distribution unit is arranged in the containing cavity, electrically connected with the battery module and used for controlling connection and disconnection between the battery module and an external high-voltage power source.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, specifically to a battery pack and energy storage equipment. Background Technology

[0002] Low-voltage battery packs are widely used in new energy products, typically for vehicle starting, steering, and energy recovery. Taking new energy vehicles as an example, the low-voltage battery pack is usually connected to a high-voltage power battery, which provides the energy source. In practical applications, when a new energy vehicle is parked for an extended period, the battery pack discharges, causing a voltage drop. This triggers the charging switch in the BMS (Battery Management System) to disconnect, preventing the low-voltage battery pack from charging. When the low-voltage battery pack is undervoltage, causing the charging switch to disconnect, the usual solution is to remove the low-voltage battery pack, manually close the charging switch, and then power on the low-voltage battery pack. However, manual removal not only carries the risk of damaging the battery pack casing but also poses safety hazards for non-professionals. Sending it to the manufacturer for repair is time-consuming, labor-intensive, and costly. Utility Model Content

[0003] The present invention provides a battery pack and energy storage device that can improve the technical problem of requiring manual disassembly of low-voltage battery packs due to undervoltage-induced failures.

[0004] In a first aspect, embodiments of the present invention provide a battery pack, comprising:

[0005] A housing having an internal cavity, and a first connecting portion and a second connecting portion provided on the housing;

[0006] A battery module is disposed within the receiving cavity. The battery module is electrically connected to an external high-voltage power supply through the first connecting part, and the battery module is electrically connected to an external low-voltage power supply through the second connecting part.

[0007] A battery management unit, disposed within the receiving cavity and electrically connected to the battery module, is used to monitor the charge and discharge status of the battery module; and,

[0008] A battery power distribution unit is disposed within the receiving cavity. The battery power distribution unit is electrically connected to the battery module and is used to control the connection and disconnection between the battery module and an external high-voltage power source.

[0009] In one embodiment, the battery module includes a positive terminal and a negative terminal;

[0010] The housing is provided with a positive terminal and a negative terminal for connecting to an external high-voltage power supply. One end of the positive terminal passes through the housing and is electrically connected to the positive terminal. One end of the negative terminal passes through the housing and is electrically connected to the negative terminal.

[0011] The first connection portion includes the positive terminal and the negative terminal.

[0012] In one embodiment, the battery module includes a positive terminal and a negative terminal;

[0013] The housing is provided with a charging interface for connecting to an external low-voltage power source.

[0014] The battery pack also includes a connecting wire, one end of which is electrically connected to the positive terminal and the negative terminal respectively, and the other end of which is electrically connected to the input terminal of the charging interface;

[0015] The second connection part includes the charging interface.

[0016] In one embodiment, the battery module includes:

[0017] Multiple battery cells, wherein the multiple battery cells are connected in series and parallel via connecting aluminum busbars, and the multiple battery cells include at least two first battery cells located at the beginning and end; and,

[0018] The aluminum busbar includes a positive lead-out aluminum busbar and a negative lead-out aluminum busbar. The positive lead-out aluminum busbar is electrically connected to the positive electrode of one of the first battery cells, and the negative lead-out aluminum busbar is electrically connected to the negative electrode of another of the first battery cells.

[0019] The positive electrode connection terminal includes the positive electrode lead-out aluminum busbar, and the negative electrode connection terminal includes the negative electrode lead-out aluminum busbar.

[0020] In one embodiment, the battery pack further includes a charging module electrically connected to the battery module and the first connection portion, for converting the voltage output from an external high-voltage power supply into a low-voltage DC voltage and charging the battery module.

[0021] In one embodiment, the battery pack further includes a buffer pad disposed between the side of the battery module and the inner wall of the receiving cavity.

[0022] In one embodiment, the housing includes:

[0023] The housing, wherein the housing forms a receiving groove with an opening on one side; and,

[0024] A cover that closes to the opening of the receiving groove to form the receiving cavity;

[0025] The battery module, the battery management unit, and the battery power distribution unit are disposed within the receiving slot;

[0026] The first connecting portion and the second connecting portion are disposed on the outer wall of the cover.

[0027] In one embodiment, the outer wall of the box body is provided with a plurality of protruding ribs, which are arranged in a crisscross pattern.

[0028] Secondly, embodiments of this utility model provide an energy storage device, comprising:

[0029] The aforementioned battery pack;

[0030] An external high-voltage power supply is electrically connected to a first connection portion on the battery pack.

[0031] An external low-voltage power supply is electrically connected to a second connection portion on the battery pack.

[0032] In one embodiment, the external low-voltage power supply is configured as a 12V power supply or a 48V power supply.

[0033] The beneficial effects of the embodiments of this utility model are as follows:

[0034] In embodiments of this utility model, the battery module of the battery pack is electrically connected to an external high-voltage power supply via a first connection and to an external low-voltage power supply via a second connection. The battery management unit monitors the charging and discharging status of the battery module. The battery power distribution unit controls the connection between the battery module and the external high-voltage power supply. Normally, the external high-voltage power supply charges the battery pack. When the battery pack experiences undervoltage due to prolonged storage or a sudden voltage drop in a low-temperature environment, the battery power distribution unit disconnects the battery module from the external high-voltage power supply, and the connection cannot be restored, thus preventing the external high-voltage power supply from charging the battery pack again. In this case, the external low-voltage power supply can be used to directly charge the battery pack, which not only allows the voltage inside the battery pack to recover quickly, enabling the battery power distribution unit to control the battery module to restore the connection between the battery module and the external high-voltage power supply, allowing the battery pack to be charged again using the external high-voltage power supply, but also eliminates the need for manual disassembly of the battery pack for maintenance, eliminating safety hazards and reducing maintenance difficulty. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is an axonometric view of a battery pack (structurally exploded) provided in an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 Axonometric view of the battery module in the middle;

[0038] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the image;

[0039] Figure 4 This is a diagram of the charging module of the energy storage device provided in an embodiment of this utility model.

[0040] The names of the components corresponding to the corresponding reference numerals in the figure are:

[0041] 1000 energy storage devices;

[0042] 100 Battery Pack; 1 Housing; 11 Receiving Cavity; 11a Inner Wall; 12 Positive Terminal; 13 Negative Terminal; 14 Charging Interface; 15 Box Body; 151 Receiving Slot; 152 Opening; 153 Outer Wall; 154 Rib; 16 Cover; 161 Outer Wall; 2 First Connecting Part; 3 Second Connecting Part; 4 Battery Module; 4a Side Part; 41 Positive Connecting Terminal; 42 Negative Connecting Terminal; 43 Battery Cell; 44 Connecting Aluminum Busbar; 45 Lead-out Aluminum Busbar; 451 Positive Lead-out Aluminum Busbar; 452 Negative Lead-out Aluminum Busbar; 46 Welding Point; 51 Battery Management Unit; 52 Battery Power Distribution Unit; 53 Charging Module; 54 Printed Circuit Board; 6 Connecting Wire; 7 Buffer Pad;

[0043] 200 External high-voltage power supply;

[0044] 300V external low-voltage power supply; Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0046] In one aspect, this utility model provides a battery pack 100. Please refer to [link / reference needed]. Figures 1 to 3 The battery pack 100 includes a housing 1, a battery module 4, a battery management unit 51, and a battery power distribution unit 52. A receiving cavity 11 is formed within the housing 1, and a first connecting portion 2 and a second connecting portion 3 are provided on the housing 1. The battery module 4 is disposed within the receiving cavity 11, and is electrically connected to an external high-voltage power supply 200 via the first connecting portion 2, and electrically connected to an external low-voltage power supply 300 via the second connecting portion 3. The battery management unit 51 is disposed within the receiving cavity 11 and electrically connected to the battery module 4, for monitoring the charging and discharging state of the battery module 4. The battery power distribution unit 52 is disposed within the receiving cavity 11 and electrically connected to the battery module 4, for controlling the connection and disconnection between the battery module 4 and the external high-voltage power supply 200.

[0047] In this invention, the battery pack 100 includes a BDU (Battery Distribution Unit 52), which is an internal design of the battery pack 100 and belongs to a type of high-voltage distribution box. The battery distribution unit 52 generally includes a system main contactor, a pre-charge relay, and a current sensor. The system main contactor is used to open / close the main DC current of the battery pack 100, and simultaneously inputs current to the battery pack 100 during charging or current feedback. The pre-charge relay is used to protect the high-voltage circuit from the instantaneous large current surge when the system is powered on. The current sensor is used to measure and calculate the capacity of the battery pack 100. The main contactor can input current to the battery pack 100 during charging or current feedback. When a system error occurs, the battery system, based on a command from the vehicle controller, cuts off the current through the main contactor to ensure system safety.

[0048] Furthermore, a PDU (Power Distribution Unit) is integrated on the battery power distribution unit 52. The power distribution unit connects high-voltage components electrically through busbars and wiring harnesses, providing functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control for the high-voltage system of new energy vehicles, thereby protecting and monitoring the operation of the high-voltage system.

[0049] The BMS (Battery Management System) of the battery pack 100 is a control system that protects the safety of the power battery. The battery management unit 51 monitors the battery's usage status at all times and takes necessary measures to mitigate the inconsistency of the battery pack, thus ensuring the safety of new energy vehicles.

[0050] The battery pack 100 also includes a charging module 53, which integrates an OBC (On Board Charger) and a DC / DC converter. The on-board charger is a power electronic device for charging the vehicle's power battery, capable of safely and reliably managing the charging of the power battery. The DC / DC converter provides the necessary power for the power steering system, air conditioning, and other auxiliary equipment.

[0051] In the embodiments of this utility model, the working processes of each component are as follows:

[0052] The battery management unit 51 collects the voltage and temperature of the battery module 4, determines the current rechargeable strategy based on the current voltage and temperature, and feeds this information back to the charging module 53. The charging module 53 receives the instruction from the battery management unit 51 and initiates charging. The battery power distribution unit 52 is electrically connected to the charging module 53. An external high-voltage power supply 200 provides a 220V / 380V AC voltage input, which is converted into a low-voltage DC voltage by the charging module 53. The battery power distribution unit 52 transmits the low-voltage DC voltage to the charging module 53, thereby charging the battery. The battery power distribution unit 52 has built-in contactors, current sensors, and relays. The battery management unit 51 controls the contactors and relays and simultaneously collects the total battery voltage and current. The battery management unit 51 is electrically connected to the battery module 4 via a low-voltage wiring harness, thereby collecting the voltage of the individual cells 43 within the battery module 4 and the temperature of the battery module 4.

[0053] In this embodiment of the invention, the battery pack 100 has two charging circuits: Normally, the voltage input from the external high-voltage power supply 200 is converted into a low-voltage DC voltage by the charging module 53 and then transmitted to the battery module 4 by the battery distribution unit 52, thereby charging the battery pack 100. When the battery pack 100 experiences undervoltage due to prolonged storage or a sudden voltage drop in a low-temperature environment, the battery distribution unit 52 controls the battery module 4 to disconnect from the external high-voltage power supply 200, and this disconnection cannot be restored, preventing the external high-voltage power supply 200 from charging the battery pack 100 again. In this case, the external low-voltage power supply 300 can be used to directly charge the battery module 4. This not only allows the voltage inside the battery pack 100 to recover quickly, enabling the battery distribution unit 52 to control the battery module 4 to reconnect with the external high-voltage power supply 200, allowing the battery pack 100 to be charged again, but also eliminates the need for manual disassembly of the battery pack 100 for maintenance, thus eliminating safety hazards and reducing maintenance difficulty.

[0054] And, please see Figure 1The battery pack 100 includes a housing 1, and a receiving cavity 11 is formed inside the housing 1. The battery module 4, the battery management unit 51 and the battery power distribution unit 52 are all disposed in the receiving cavity 11. The housing 1 can be waterproof and dustproof, thereby improving the safety performance of the battery pack 100.

[0055] Please see Figure 1 The battery module 4 includes a positive terminal 41 and a negative terminal 42; the housing 1 is provided with a positive terminal 12 and a negative terminal 13 for connecting to an external high-voltage power supply 200. One end of the positive terminal 12 passes through the housing 1 and is electrically connected to the positive terminal 41, and one end of the negative terminal 13 passes through the housing 1 and is electrically connected to the negative terminal 42; wherein, the first connection part 2 includes the positive terminal 12 and the negative terminal 13.

[0056] In this embodiment, the positive terminal 12 and the negative terminal 13 are provided on the housing 1. The positive terminal 12 is connected to the positive terminal of the vehicle's power line, and the negative terminal 13 is connected to the negative terminal of the vehicle's power line, for charging the low-voltage battery pack 100 by the external high-voltage power supply 200. Typically, the charging current of the external high-voltage power supply 200 is relatively large, generally 1A to 100A.

[0057] Please see Figure 1 The battery module 4 includes a positive terminal 41 and a negative terminal 42; the housing 1 is provided with a charging interface 14 for connecting to an external low-voltage power supply 300; the battery pack 100 also includes a connecting wire 6, one end 61 of which is electrically connected to the positive terminal 41 and the negative terminal 42 respectively, and the other end 62 of which is electrically connected to the input terminal 141 of the charging interface 14; wherein, the second connecting part 3 includes the charging interface 14.

[0058] In this embodiment, the charging interface 14 is provided on the housing 1. One end 61 of the connecting line 6 is electrically connected to the positive terminal 41 and the negative terminal 42 respectively, and the other end 62 of the connecting line 6 is electrically connected to the input terminal 141 of the charging interface 14. When an external low-voltage power supply 300 is plugged into the charging interface 14, the external low-voltage power supply 300 can charge the battery pack 100.

[0059] In one embodiment of this utility model, please refer to Figure 2 and Figure 3The battery module 4 includes multiple battery cells 43 and lead-out aluminum busbars 45; the multiple battery cells 43 are connected in series via connecting aluminum busbars 44, and the multiple battery cells 43 include two first battery cells 43 located at the first and last ends; the lead-out aluminum busbars 45 include a positive lead-out aluminum busbar 451 and a negative lead-out aluminum busbar 452, the positive lead-out aluminum busbar 451 is electrically connected to the positive electrode of one of the first battery cells 43, and the negative lead-out aluminum busbar 452 is electrically connected to the negative electrode of another first battery cell 43; wherein, the positive electrode connection end 41 includes the positive lead-out aluminum busbar 451, and the negative electrode connection end 42 includes the negative lead-out aluminum busbar 452.

[0060] In this embodiment, the battery module 4 includes multiple battery cells 43, which are the main functional units of the battery module 4. Multiple battery cells 43 can be connected in series and parallel via the connecting aluminum busbar 44, thereby enabling higher voltage, greater current, or power transmission. In the two first battery cells 43 located at the beginning and end, the positive electrode lead-out aluminum busbar 451 is electrically connected to the positive electrode of one first battery cell 43, and the negative electrode lead-out aluminum busbar 452 is electrically connected to the negative electrode of the other first battery cell 43. That is, the positive electrode lead-out aluminum busbar 451 is connected to the overall positive terminal of the battery module 4, and the negative electrode lead-out aluminum busbar 452 is connected to the overall negative terminal of the battery module 4. By setting the positive electrode lead-out aluminum busbar 451 and the negative electrode lead-out aluminum busbar 452, the battery module 4 can be charged and discharged with a large current by an external high-voltage power supply 200 or an external low-voltage power supply 300.

[0061] Further reading Figure 3 Welding points 46 are respectively provided on the positive electrode lead-out aluminum busbar 451 and the negative electrode lead-out aluminum busbar 452. One end of the connecting wire 6 is welded and fixed to the welding point 46, and the other end of the connecting wire 6 is electrically connected to the charging interface 14 on the housing 1. When the voltage of the battery pack 100 is too low and cannot be charged through the positive electrode post 12 and the negative electrode post 13, the battery pack 100 can be charged through the charging interface 14 and the connecting wire 6. Usually, the external low-voltage power supply 300 performs small-current charging, and the charging current is set to 0.1~1A. To ensure the overcurrent capacity of the connecting wire 6, the connecting wire 6 is made of copper wire, and the wire diameter of the connecting wire 6 is not less than 0.5mm; and to ensure the charging stability of the external low-voltage power supply 300, the connecting wire 6 is ultrasonically welded or laser welded to the positive electrode lead-out aluminum busbar 451 and the negative electrode lead-out aluminum busbar 452.

[0062] In one embodiment, the battery pack 100 further includes a buffer pad 7, which is disposed between the side 4a of the battery module 4 and the inner wall of the receiving cavity 11. By providing the buffer pad 7, the battery module 4 and the housing 1 are isolated. When the battery pack 100 is impacted or the battery module 4 expands, the buffer pad 7 can absorb the impact energy, or provide expansion space for the battery module 4 by its own compression, thereby protecting the battery module 4 from damage and extending the service life of the battery pack 100.

[0063] This application does not impose specific limitations on the form of the cushioning pad 7. Preferably, the cushioning pad 7 is made of foam.

[0064] In one embodiment, the housing 1 includes a box body 15 and a cover body 16; the box body 15 forms a receiving groove 151 with an opening 152 on one side; the cover body 16 covers the opening 152 of the receiving groove 151 to jointly form the receiving cavity 11; wherein, the battery module 4, the battery management unit 51 and the battery power distribution unit 52 are disposed in the receiving groove 151; the first connecting part 2 and the second connecting part 3 are disposed on the outer wall 161 of the cover body 16.

[0065] Furthermore, the outer side wall 153 of the box body 15 is provided with a plurality of protruding ribs 154, and the plurality of protruding ribs 154 are arranged in a crisscross pattern.

[0066] In this embodiment, the housing 15 is provided with a receiving groove 151, and the battery module 4, the battery management unit 51 and the battery power distribution unit 52 are disposed in the receiving groove 151. The cover 16 covers the opening 152 of the receiving groove 151, thus achieving waterproof and dustproof protection. At the same time, multiple crisscrossing ribs 154 are provided on the outer side wall 153 of the housing 15, which can improve the strength of the housing 15 and prevent the housing 15 from breaking due to impact or compression when the battery pack 100 is impacted or the battery module 4 expands.

[0067] Please refer to further information. Figure 1 In one embodiment, the battery pack 100 further includes a printed circuit board 54, which is disposed above the battery module 4 and between the battery module 4 and the top cover; the battery management unit 51, the battery power distribution unit 52 and the charging module 53 are all integrated on the printed circuit board 54; this arrangement allows for a more reasonable spatial arrangement within the battery pack 100.

[0068] Secondly, embodiments of this application also provide an energy storage device 1000. Please refer to... Figure 4The energy storage device 1000 includes a battery pack 100, an external high-voltage power supply 200, and an external low-voltage power supply 300. The external high-voltage power supply 200 is electrically connected to a first connection portion 2 on the battery pack 100; the external low-voltage power supply 300 is electrically connected to a second connection portion 3 on the battery pack 100. It should be noted that the battery pack 100 is configured as described above, meaning that the battery pack 100 possesses all the technical features of the aforementioned battery pack 100, and therefore, the energy storage device 1000 includes all embodiments of the aforementioned battery pack 100.

[0069] Normally, the battery pack 100 is charged by an external high-voltage power supply 200. When the battery pack 100 becomes undervoltage due to prolonged storage or experiences a sudden voltage drop in a low-temperature environment, the battery distribution unit 52 controls the battery module 4 to disconnect from the external high-voltage power supply 200 and cannot restore conduction, thus preventing the external high-voltage power supply 200 from charging the battery pack 100 again. In this case, the battery pack 100 can be charged directly by an external low-voltage power supply 300. This not only allows the voltage inside the battery pack 100 to recover quickly, enabling the battery distribution unit 52 to control the battery module 4 to restore conduction with the external high-voltage power supply 200, allowing the battery pack 100 to be charged again by the external high-voltage power supply 200, but also eliminates the need for manual disassembly of the battery pack 100 for maintenance, eliminating safety hazards and reducing maintenance difficulty.

[0070] This application does not impose specific limitations on the form of the external low-voltage power supply 300. In one embodiment, the external low-voltage power supply 300 is configured as a 12V power supply or a 48V power supply; in another embodiment, a 220V power supply may be used, converted to 12V / 48V voltage, to charge the battery pack 100.

[0071] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized in that, include: A housing having an internal cavity, and a first connecting portion and a second connecting portion provided on the housing; A battery module is disposed within the receiving cavity. The battery module is electrically connected to an external high-voltage power supply through the first connecting part, and the battery module is electrically connected to an external low-voltage power supply through the second connecting part. A battery management unit is disposed within the receiving cavity and electrically connected to the battery module to monitor the charging and discharging status of the battery module. as well as, A battery power distribution unit is disposed within the receiving cavity. The battery power distribution unit is electrically connected to the battery module and is used to control the connection and disconnection between the battery module and an external high-voltage power source.

2. The battery pack according to claim 1, characterized in that, The battery module includes a positive terminal and a negative terminal; The housing is provided with a positive terminal and a negative terminal for connecting to an external high-voltage power supply. One end of the positive terminal passes through the housing and is electrically connected to the positive terminal. One end of the negative terminal passes through the housing and is electrically connected to the negative terminal. The first connection portion includes the positive terminal and the negative terminal.

3. The battery pack according to claim 1, characterized in that, The battery module includes a positive terminal and a negative terminal; The housing is provided with a charging interface for connecting to an external low-voltage power source. The battery pack also includes a connecting wire, one end of which is electrically connected to the positive terminal and the negative terminal respectively, and the other end of which is electrically connected to the input terminal of the charging interface; The second connection part includes the charging interface.

4. The battery pack according to claim 2 or 3, characterized in that, The battery module includes: Multiple battery cells, wherein the multiple battery cells are connected in series and parallel via connecting aluminum busbars, and the multiple battery cells include at least two first battery cells located at the beginning and end; and, The aluminum busbar includes a positive lead-out aluminum busbar and a negative lead-out aluminum busbar. The positive lead-out aluminum busbar is electrically connected to the positive electrode of one of the first battery cells, and the negative lead-out aluminum busbar is electrically connected to the negative electrode of another of the first battery cells. The positive electrode connection terminal includes the positive electrode lead-out aluminum busbar, and the negative electrode connection terminal includes the negative electrode lead-out aluminum busbar.

5. The battery pack according to claim 1, characterized in that, The battery pack also includes a charging module, which is electrically connected to the battery module and the first connection part to convert the voltage output from the external high-voltage power supply into a low DC voltage and charge the battery module.

6. The battery pack according to claim 1, characterized in that, The battery pack also includes a buffer pad disposed between the side of the battery module and the inner wall of the receiving cavity.

7. The battery pack according to claim 1, characterized in that, The housing includes: The housing, wherein the housing forms a receiving groove with an opening on one side; and, A cover that closes to the opening of the receiving groove to form the receiving cavity; The battery module, the battery management unit, and the battery power distribution unit are disposed within the receiving slot; The first connecting portion and the second connecting portion are disposed on the outer wall of the cover.

8. The battery pack according to claim 7, characterized in that, The outer wall of the box is provided with multiple protruding ribs, which are arranged in a crisscross pattern.

9. An energy storage device, characterized in that, include: The battery pack as described in any one of claims 1-8; An external high-voltage power supply is electrically connected to a first connection portion on the battery pack. An external low-voltage power supply is electrically connected to a second connection portion on the battery pack.

10. The energy storage device according to claim 9, characterized in that, The external low-voltage power supply is configured as either a 12V power supply or a 48V power supply.

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